diff options
Diffstat (limited to 'target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch b/target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch new file mode 100644 index 0000000000..9b6026d914 --- /dev/null +++ b/target/linux/ipq806x/patches-4.4/096-07-usb-dwc3-drop-FIFO-resizing-logic.patch @@ -0,0 +1,258 @@ +From bc5081617faeb3b2f0c126dc37264b87af7da47f Mon Sep 17 00:00:00 2001 +From: Felipe Balbi <felipe.balbi@linux.intel.com> +Date: Thu, 4 Feb 2016 14:18:01 +0200 +Subject: usb: dwc3: drop FIFO resizing logic + +That FIFO resizing logic was added to support OMAP5 +ES1.0 which had a bogus default FIFO size. I can't +remember the exact size of default FIFO, but it was +less than one bulk superspeed packet (<1024) which +would prevent USB3 from ever working on OMAP5 ES1.0. + +However, OMAP5 ES1.0 support has been dropped by +commit aa2f4b16f830 ("ARM: OMAP5: id: Remove ES1.0 +support") which renders FIFO resizing unnecessary. + +Tested-by: Kishon Vijay Abraham I <kishon@ti.com> +Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> +--- + Documentation/devicetree/bindings/usb/dwc3.txt | 4 +- + .../devicetree/bindings/usb/qcom,dwc3.txt | 1 - + drivers/usb/dwc3/core.c | 4 - + drivers/usb/dwc3/core.h | 5 -- + drivers/usb/dwc3/ep0.c | 9 --- + drivers/usb/dwc3/gadget.c | 86 ---------------------- + drivers/usb/dwc3/platform_data.h | 1 - + 7 files changed, 2 insertions(+), 108 deletions(-) + +diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt +index fb2ad0a..1569568 100644 +--- a/Documentation/devicetree/bindings/usb/dwc3.txt ++++ b/Documentation/devicetree/bindings/usb/dwc3.txt +@@ -14,7 +14,6 @@ Optional properties: + the second element is expected to be a handle to the USB3/SS PHY + - phys: from the *Generic PHY* bindings + - phy-names: from the *Generic PHY* bindings +- - tx-fifo-resize: determines if the FIFO *has* to be reallocated. + - snps,usb3_lpm_capable: determines if platform is USB3 LPM capable + - snps,disable_scramble_quirk: true when SW should disable data scrambling. + Only really useful for FPGA builds. +@@ -47,6 +46,8 @@ Optional properties: + register for post-silicon frame length adjustment when the + fladj_30mhz_sdbnd signal is invalid or incorrect. + ++ - <DEPRECATED> tx-fifo-resize: determines if the FIFO *has* to be reallocated. ++ + This is usually a subnode to DWC3 glue to which it is connected. + + dwc3@4a030000 { +@@ -54,5 +55,4 @@ dwc3@4a030000 { + reg = <0x4a030000 0xcfff>; + interrupts = <0 92 4> + usb-phy = <&usb2_phy>, <&usb3,phy>; +- tx-fifo-resize; + }; +diff --git a/Documentation/devicetree/bindings/usb/qcom,dwc3.txt b/Documentation/devicetree/bindings/usb/qcom,dwc3.txt +index ca164e7..39acb08 100644 +--- a/Documentation/devicetree/bindings/usb/qcom,dwc3.txt ++++ b/Documentation/devicetree/bindings/usb/qcom,dwc3.txt +@@ -59,7 +59,6 @@ Example device nodes: + interrupts = <0 205 0x4>; + phys = <&hs_phy>, <&ss_phy>; + phy-names = "usb2-phy", "usb3-phy"; +- tx-fifo-resize; + dr_mode = "host"; + }; + }; +diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c +index fa20f5a9..67d183a 100644 +--- a/drivers/usb/dwc3/core.c ++++ b/drivers/usb/dwc3/core.c +@@ -882,9 +882,6 @@ static int dwc3_probe(struct platform_device *pdev) + dwc->usb3_lpm_capable = device_property_read_bool(dev, + "snps,usb3_lpm_capable"); + +- dwc->needs_fifo_resize = device_property_read_bool(dev, +- "tx-fifo-resize"); +- + dwc->disable_scramble_quirk = device_property_read_bool(dev, + "snps,disable_scramble_quirk"); + dwc->u2exit_lfps_quirk = device_property_read_bool(dev, +@@ -926,7 +923,6 @@ static int dwc3_probe(struct platform_device *pdev) + if (pdata->hird_threshold) + hird_threshold = pdata->hird_threshold; + +- dwc->needs_fifo_resize = pdata->tx_fifo_resize; + dwc->usb3_lpm_capable = pdata->usb3_lpm_capable; + dwc->dr_mode = pdata->dr_mode; + +diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h +index 6254b2f..7cbe9e9 100644 +--- a/drivers/usb/dwc3/core.h ++++ b/drivers/usb/dwc3/core.h +@@ -709,9 +709,7 @@ struct dwc3_scratchpad_array { + * 0 - utmi_sleep_n + * 1 - utmi_l1_suspend_n + * @is_fpga: true when we are using the FPGA board +- * @needs_fifo_resize: not all users might want fifo resizing, flag it + * @pullups_connected: true when Run/Stop bit is set +- * @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes. + * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround + * @start_config_issued: true when StartConfig command has been issued + * @three_stage_setup: set if we perform a three phase setup +@@ -855,9 +853,7 @@ struct dwc3 { + unsigned has_lpm_erratum:1; + unsigned is_utmi_l1_suspend:1; + unsigned is_fpga:1; +- unsigned needs_fifo_resize:1; + unsigned pullups_connected:1; +- unsigned resize_fifos:1; + unsigned setup_packet_pending:1; + unsigned three_stage_setup:1; + unsigned usb3_lpm_capable:1; +@@ -1025,7 +1021,6 @@ struct dwc3_gadget_ep_cmd_params { + + /* prototypes */ + void dwc3_set_mode(struct dwc3 *dwc, u32 mode); +-int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc); + + /* check whether we are on the DWC_usb31 core */ + static inline bool dwc3_is_usb31(struct dwc3 *dwc) +diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c +index eca2e6d..4454de0 100644 +--- a/drivers/usb/dwc3/ep0.c ++++ b/drivers/usb/dwc3/ep0.c +@@ -586,9 +586,6 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl) + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg |= (DWC3_DCTL_ACCEPTU1ENA | DWC3_DCTL_ACCEPTU2ENA); + dwc3_writel(dwc->regs, DWC3_DCTL, reg); +- +- dwc->resize_fifos = true; +- dwc3_trace(trace_dwc3_ep0, "resize FIFOs flag SET"); + } + break; + +@@ -1027,12 +1024,6 @@ static int dwc3_ep0_start_control_status(struct dwc3_ep *dep) + + static void __dwc3_ep0_do_control_status(struct dwc3 *dwc, struct dwc3_ep *dep) + { +- if (dwc->resize_fifos) { +- dwc3_trace(trace_dwc3_ep0, "Resizing FIFOs"); +- dwc3_gadget_resize_tx_fifos(dwc); +- dwc->resize_fifos = 0; +- } +- + WARN_ON(dwc3_ep0_start_control_status(dep)); + } + +diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c +index d54a028..3a5c271 100644 +--- a/drivers/usb/dwc3/gadget.c ++++ b/drivers/usb/dwc3/gadget.c +@@ -145,92 +145,6 @@ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state) + return -ETIMEDOUT; + } + +-/** +- * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case +- * @dwc: pointer to our context structure +- * +- * This function will a best effort FIFO allocation in order +- * to improve FIFO usage and throughput, while still allowing +- * us to enable as many endpoints as possible. +- * +- * Keep in mind that this operation will be highly dependent +- * on the configured size for RAM1 - which contains TxFifo -, +- * the amount of endpoints enabled on coreConsultant tool, and +- * the width of the Master Bus. +- * +- * In the ideal world, we would always be able to satisfy the +- * following equation: +- * +- * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \ +- * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes +- * +- * Unfortunately, due to many variables that's not always the case. +- */ +-int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc) +-{ +- int last_fifo_depth = 0; +- int ram1_depth; +- int fifo_size; +- int mdwidth; +- int num; +- +- if (!dwc->needs_fifo_resize) +- return 0; +- +- ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7); +- mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); +- +- /* MDWIDTH is represented in bits, we need it in bytes */ +- mdwidth >>= 3; +- +- /* +- * FIXME For now we will only allocate 1 wMaxPacketSize space +- * for each enabled endpoint, later patches will come to +- * improve this algorithm so that we better use the internal +- * FIFO space +- */ +- for (num = 0; num < dwc->num_in_eps; num++) { +- /* bit0 indicates direction; 1 means IN ep */ +- struct dwc3_ep *dep = dwc->eps[(num << 1) | 1]; +- int mult = 1; +- int tmp; +- +- if (!(dep->flags & DWC3_EP_ENABLED)) +- continue; +- +- if (usb_endpoint_xfer_bulk(dep->endpoint.desc) +- || usb_endpoint_xfer_isoc(dep->endpoint.desc)) +- mult = 3; +- +- /* +- * REVISIT: the following assumes we will always have enough +- * space available on the FIFO RAM for all possible use cases. +- * Make sure that's true somehow and change FIFO allocation +- * accordingly. +- * +- * If we have Bulk or Isochronous endpoints, we want +- * them to be able to be very, very fast. So we're giving +- * those endpoints a fifo_size which is enough for 3 full +- * packets +- */ +- tmp = mult * (dep->endpoint.maxpacket + mdwidth); +- tmp += mdwidth; +- +- fifo_size = DIV_ROUND_UP(tmp, mdwidth); +- +- fifo_size |= (last_fifo_depth << 16); +- +- dwc3_trace(trace_dwc3_gadget, "%s: Fifo Addr %04x Size %d", +- dep->name, last_fifo_depth, fifo_size & 0xffff); +- +- dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(num), fifo_size); +- +- last_fifo_depth += (fifo_size & 0xffff); +- } +- +- return 0; +-} +- + void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req, + int status) + { +diff --git a/drivers/usb/dwc3/platform_data.h b/drivers/usb/dwc3/platform_data.h +index 2bb4d3a..aaa6f00 100644 +--- a/drivers/usb/dwc3/platform_data.h ++++ b/drivers/usb/dwc3/platform_data.h +@@ -23,7 +23,6 @@ + struct dwc3_platform_data { + enum usb_device_speed maximum_speed; + enum usb_dr_mode dr_mode; +- bool tx_fifo_resize; + bool usb3_lpm_capable; + + unsigned is_utmi_l1_suspend:1; +-- +cgit v0.12 |