diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/0135-ARM64-DWC_OTG-Port-dwc_otg-driver-to-ARM64.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/0135-ARM64-DWC_OTG-Port-dwc_otg-driver-to-ARM64.patch | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/0135-ARM64-DWC_OTG-Port-dwc_otg-driver-to-ARM64.patch b/target/linux/brcm2708/patches-4.9/0135-ARM64-DWC_OTG-Port-dwc_otg-driver-to-ARM64.patch new file mode 100644 index 0000000000..4bb85d01c2 --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/0135-ARM64-DWC_OTG-Port-dwc_otg-driver-to-ARM64.patch @@ -0,0 +1,329 @@ +From 2f15deb5ab0fafa71f00bcf840cd01893b829555 Mon Sep 17 00:00:00 2001 +From: Michael Zoran <mzoran@crowfest.net> +Date: Sat, 14 Jan 2017 21:33:51 -0800 +Subject: [PATCH] ARM64/DWC_OTG: Port dwc_otg driver to ARM64 + +In ARM64, the FIQ mechanism used by this driver is not current +implemented. As a workaround, reqular IRQ is used instead +of FIQ. + +In a separate change, the IRQ-CPU mapping is round robined +on ARM64 to increase concurrency and allow multiple interrupts +to be serviced at a time. This reduces the need for FIQ. + +Tests Run: + +This mechanism is most likely to break when multiple USB devices +are attached at the same time. So the system was tested under +stress. + +Devices: + +1. USB Speakers playing back a FLAC audio through VLC + at 96KHz.(Higher then typically, but supported on my speakers). + +2. sftp transferring large files through the buildin ethernet + connection which is connected through USB. + +3. Keyboard and mouse attached and being used. + +Although I do occasionally hear some glitches, the music seems to +play quite well. + +Signed-off-by: Michael Zoran <mzoran@crowfest.net> +--- + drivers/usb/host/dwc_otg/Makefile | 3 ++ + drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c | 17 +++++++ + drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h | 24 ++++++++++ + drivers/usb/host/dwc_otg/dwc_otg_hcd.c | 4 ++ + drivers/usb/host/dwc_otg/dwc_otg_hcd_if.h | 4 ++ + drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c | 3 +- + drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c | 72 ++++++++++++++++++++++++++++ + drivers/usb/host/dwc_otg/dwc_otg_os_dep.h | 2 + + 8 files changed, 128 insertions(+), 1 deletion(-) + +--- a/drivers/usb/host/dwc_otg/Makefile ++++ b/drivers/usb/host/dwc_otg/Makefile +@@ -37,7 +37,10 @@ dwc_otg-objs += dwc_otg_pcd_linux.o dwc_ + dwc_otg-objs += dwc_otg_hcd.o dwc_otg_hcd_linux.o dwc_otg_hcd_intr.o dwc_otg_hcd_queue.o dwc_otg_hcd_ddma.o + dwc_otg-objs += dwc_otg_adp.o + dwc_otg-objs += dwc_otg_fiq_fsm.o ++ifneq ($(CONFIG_ARM64),y) + dwc_otg-objs += dwc_otg_fiq_stub.o ++endif ++ + ifneq ($(CFI),) + dwc_otg-objs += dwc_otg_cfi.o + endif +--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.c +@@ -74,6 +74,21 @@ void notrace _fiq_print(enum fiq_debug_l + } + } + ++ ++#ifdef CONFIG_ARM64 ++ ++inline void fiq_fsm_spin_lock(fiq_lock_t *lock) ++{ ++ spin_lock((spinlock_t *)lock); ++} ++ ++inline void fiq_fsm_spin_unlock(fiq_lock_t *lock) ++{ ++ spin_unlock((spinlock_t *)lock); ++} ++ ++#else ++ + /** + * fiq_fsm_spin_lock() - ARMv6+ bare bones spinlock + * Must be called with local interrupts and FIQ disabled. +@@ -122,6 +137,8 @@ inline void fiq_fsm_spin_unlock(fiq_lock + inline void fiq_fsm_spin_unlock(fiq_lock_t *lock) { } + #endif + ++#endif ++ + /** + * fiq_fsm_restart_channel() - Poke channel enable bit for a split transaction + * @channel: channel to re-enable +--- a/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h ++++ b/drivers/usb/host/dwc_otg/dwc_otg_fiq_fsm.h +@@ -127,6 +127,12 @@ enum fiq_debug_level { + FIQDBG_PORTHUB = (1 << 3), + }; + ++#ifdef CONFIG_ARM64 ++ ++typedef spinlock_t fiq_lock_t; ++ ++#else ++ + typedef struct { + union { + uint32_t slock; +@@ -137,6 +143,8 @@ typedef struct { + }; + } fiq_lock_t; + ++#endif ++ + struct fiq_state; + + extern void _fiq_print (enum fiq_debug_level dbg_lvl, volatile struct fiq_state *state, char *fmt, ...); +@@ -355,6 +363,22 @@ struct fiq_state { + struct fiq_channel_state channel[0]; + }; + ++#ifdef CONFIG_ARM64 ++ ++#ifdef local_fiq_enable ++#undef local_fiq_enable ++#endif ++ ++#ifdef local_fiq_disable ++#undef local_fiq_disable ++#endif ++ ++extern void local_fiq_enable(void); ++ ++extern void local_fiq_disable(void); ++ ++#endif ++ + extern void fiq_fsm_spin_lock(fiq_lock_t *lock); + + extern void fiq_fsm_spin_unlock(fiq_lock_t *lock); +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd.c +@@ -1021,6 +1021,10 @@ int dwc_otg_hcd_init(dwc_otg_hcd_t * hcd + } + DWC_MEMSET(hcd->fiq_state, 0, (sizeof(struct fiq_state) + (sizeof(struct fiq_channel_state) * num_channels))); + ++#ifdef CONFIG_ARM64 ++ spin_lock_init(&hcd->fiq_state->lock); ++#endif ++ + for (i = 0; i < num_channels; i++) { + hcd->fiq_state->channel[i].fsm = FIQ_PASSTHROUGH; + } +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_if.h ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_if.h +@@ -116,7 +116,11 @@ extern int32_t dwc_otg_hcd_handle_intr(d + /** This function is used to handle the fast interrupt + * + */ ++#ifdef CONFIG_ARM64 ++extern void dwc_otg_hcd_handle_fiq(void); ++#else + extern void __attribute__ ((naked)) dwc_otg_hcd_handle_fiq(void); ++#endif + + /** + * Returns private data set by +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_intr.c +@@ -36,8 +36,9 @@ + #include "dwc_otg_regs.h" + + #include <linux/jiffies.h> ++#ifdef CONFIG_ARM + #include <asm/fiq.h> +- ++#endif + + extern bool microframe_schedule; + +--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c ++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_linux.c +@@ -51,7 +51,9 @@ + #include <linux/dma-mapping.h> + #include <linux/version.h> + #include <asm/io.h> ++#ifdef CONFIG_ARM + #include <asm/fiq.h> ++#endif + #include <linux/usb.h> + #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35) + #include <../drivers/usb/core/hcd.h> +@@ -71,6 +73,13 @@ + #include "dwc_otg_driver.h" + #include "dwc_otg_hcd.h" + ++#ifndef __virt_to_bus ++#define __virt_to_bus __virt_to_phys ++#define __bus_to_virt __phys_to_virt ++#define __pfn_to_bus(x) __pfn_to_phys(x) ++#define __bus_to_pfn(x) __phys_to_pfn(x) ++#endif ++ + extern unsigned char _dwc_otg_fiq_stub, _dwc_otg_fiq_stub_end; + + /** +@@ -393,14 +402,49 @@ static struct dwc_otg_hcd_function_ops h + .get_b_hnp_enable = _get_b_hnp_enable, + }; + ++#ifdef CONFIG_ARM64 ++ ++static int simfiq_irq = -1; ++ ++void local_fiq_enable(void) ++{ ++ if (simfiq_irq >= 0) ++ enable_irq(simfiq_irq); ++} ++ ++void local_fiq_disable(void) ++{ ++ if (simfiq_irq >= 0) ++ disable_irq(simfiq_irq); ++} ++ ++irqreturn_t fiq_irq_handler(int irq, void *dev_id) ++{ ++ dwc_otg_hcd_t *dwc_otg_hcd = (dwc_otg_hcd_t *)dev_id; ++ ++ if (fiq_fsm_enable) ++ dwc_otg_fiq_fsm(dwc_otg_hcd->fiq_state, dwc_otg_hcd->core_if->core_params->host_channels); ++ else ++ dwc_otg_fiq_nop(dwc_otg_hcd->fiq_state); ++ ++ return IRQ_HANDLED; ++} ++ ++#else + static struct fiq_handler fh = { + .name = "usb_fiq", + }; + ++#endif ++ + static void hcd_init_fiq(void *cookie) + { + dwc_otg_device_t *otg_dev = cookie; + dwc_otg_hcd_t *dwc_otg_hcd = otg_dev->hcd; ++#ifdef CONFIG_ARM64 ++ int retval = 0; ++ int irq; ++#else + struct pt_regs regs; + int irq; + +@@ -428,6 +472,7 @@ static void hcd_init_fiq(void *cookie) + + // __show_regs(®s); + set_fiq_regs(®s); ++#endif + + //Set the mphi periph to the required registers + dwc_otg_hcd->fiq_state->mphi_regs.base = otg_dev->os_dep.mphi_base; +@@ -446,6 +491,23 @@ static void hcd_init_fiq(void *cookie) + DWC_WARN("MPHI periph has NOT been enabled"); + #endif + // Enable FIQ interrupt from USB peripheral ++#ifdef CONFIG_ARM64 ++ irq = platform_get_irq(otg_dev->os_dep.platformdev, 1); ++ ++ if (irq < 0) { ++ DWC_ERROR("Can't get SIM-FIQ irq"); ++ return; ++ } ++ ++ retval = request_irq(irq, fiq_irq_handler, 0, "dwc_otg_sim-fiq", dwc_otg_hcd); ++ ++ if (retval < 0) { ++ DWC_ERROR("Unable to request SIM-FIQ irq\n"); ++ return; ++ } ++ ++ simfiq_irq = irq; ++#else + #ifdef CONFIG_MULTI_IRQ_HANDLER + irq = platform_get_irq(otg_dev->os_dep.platformdev, 1); + #else +@@ -457,6 +519,8 @@ static void hcd_init_fiq(void *cookie) + } + enable_fiq(irq); + local_fiq_enable(); ++#endif ++ + } + + /** +@@ -519,6 +583,13 @@ int hcd_init(dwc_bus_dev_t *_dev) + otg_dev->hcd = dwc_otg_hcd; + otg_dev->hcd->otg_dev = otg_dev; + ++#ifdef CONFIG_ARM64 ++ if (dwc_otg_hcd_init(dwc_otg_hcd, otg_dev->core_if)) ++ goto error2; ++ ++ if (fiq_enable) ++ hcd_init_fiq(otg_dev); ++#else + if (dwc_otg_hcd_init(dwc_otg_hcd, otg_dev->core_if)) { + goto error2; + } +@@ -531,6 +602,7 @@ int hcd_init(dwc_bus_dev_t *_dev) + smp_call_function_single(0, hcd_init_fiq, otg_dev, 1); + } + } ++#endif + + hcd->self.otg_port = dwc_otg_hcd_otg_port(dwc_otg_hcd); + #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33) //don't support for LM(with 2.6.20.1 kernel) +--- a/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h ++++ b/drivers/usb/host/dwc_otg/dwc_otg_os_dep.h +@@ -76,8 +76,10 @@ + + #ifdef PLATFORM_INTERFACE + #include <linux/platform_device.h> ++#ifdef CONFIG_ARM + #include <asm/mach/map.h> + #endif ++#endif + + /** The OS page size */ + #define DWC_OS_PAGE_SIZE PAGE_SIZE |