[v4,9/9] usb: isp1763: add peripheral mode

Message ID	20210513084717.2487366-10-rui.silva@linaro.org
State	New
Headers	show Return-Path: <linux-usb-owner@kernel.org> From: Rui Miguel Silva <rui.silva@linaro.org> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Sebastian Siewior <bigeasy@linutronix.de>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Rob Herring <robh+dt@kernel.org> Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org, Rui Miguel Silva <rui.silva@linaro.org> Subject: [PATCH v4 9/9] usb: isp1763: add peripheral mode Date: Thu, 13 May 2021 09:47:17 +0100 Message-Id: <20210513084717.2487366-10-rui.silva@linaro.org> In-Reply-To: <20210513084717.2487366-1-rui.silva@linaro.org> References: <20210513084717.2487366-1-rui.silva@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	usb: isp1760: extend support for isp1763 \| expand [v4,0/9] usb: isp1760: extend support for isp1763 [v4,1/9] usb: isp1760: fix strict typechecking [v4,2/9] usb: isp1760: move to regmap for register access [v4,3/9] usb: isp1760: use relaxed primitives [v4,4/9] usb: isp1760: remove platform data struct and code [v4,5/9] usb: isp1760: hcd: refactor mempool config and setup [v4,6/9] usb: isp1760: use dr_mode binding [v4,7/9] usb: isp1760: add support for isp1763 [v4,8/9] dt-bindings: usb: nxp,isp1760: add bindings [v4,9/9] usb: isp1763: add peripheral mode

diff --git a/drivers/usb/isp1760/isp1760-core.c b/drivers/usb/isp1760/isp1760-core.c index 1d847f13abab..ff07e2890692 100644 --- a/drivers/usb/isp1760/isp1760-core.c +++ b/drivers/usb/isp1760/isp1760-core.c @@ -83,7 +83,8 @@ static int isp1760_init_core(struct isp1760_device *isp) * * TODO: Really support OTG. For now we configure port 1 in device mode */ - if ((isp->devflags & ISP1760_FLAG_ISP1761) && + if (((isp->devflags & ISP1760_FLAG_ISP1761) || + (isp->devflags & ISP1760_FLAG_ISP1763)) && (isp->devflags & ISP1760_FLAG_PERIPHERAL_EN)) { isp1760_field_set(hcd->fields, HW_DM_PULLDOWN); isp1760_field_set(hcd->fields, HW_DP_PULLDOWN); @@ -470,13 +471,15 @@ static const struct regmap_config isp1763_dc_regmap_conf = { int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, struct device *dev, unsigned int devflags) { - bool udc_disabled = !(devflags & ISP1760_FLAG_ISP1761); const struct regmap_config *hc_regmap; const struct reg_field *hc_reg_fields; + const struct regmap_config *dc_regmap; + const struct reg_field *dc_reg_fields; struct isp1760_device *isp; struct isp1760_hcd *hcd; struct isp1760_udc *udc; struct regmap_field *f; + bool udc_enabled; int ret; int i; @@ -484,8 +487,11 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, * If neither the HCD not the UDC is enabled return an error, as no * device would be registered. */ + udc_enabled = ((devflags & ISP1760_FLAG_ISP1763) || + (devflags & ISP1760_FLAG_ISP1761)); + if ((!IS_ENABLED(CONFIG_USB_ISP1760_HCD) || usb_disabled()) && - (!IS_ENABLED(CONFIG_USB_ISP1761_UDC) || udc_disabled)) + (!IS_ENABLED(CONFIG_USB_ISP1761_UDC) || !udc_enabled)) return -ENODEV; isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL); @@ -498,6 +504,7 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, udc = &isp->udc; hcd->is_isp1763 = !!(devflags & ISP1760_FLAG_ISP1763); + udc->is_isp1763 = !!(devflags & ISP1760_FLAG_ISP1763); if (!hcd->is_isp1763 && (devflags & ISP1760_FLAG_BUS_WIDTH_8)) { dev_err(dev, "isp1760/61 do not support data width 8\n"); @@ -507,9 +514,13 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, if (hcd->is_isp1763) { hc_regmap = &isp1763_hc_regmap_conf; hc_reg_fields = &isp1763_hc_reg_fields[0]; + dc_regmap = &isp1763_dc_regmap_conf; + dc_reg_fields = &isp1763_dc_reg_fields[0]; } else { hc_regmap = &isp1760_hc_regmap_conf; hc_reg_fields = &isp1760_hc_reg_fields[0]; + dc_regmap = &isp1761_dc_regmap_conf; + dc_reg_fields = &isp1761_dc_reg_fields[0]; } isp->rst_gpio = devm_gpiod_get_optional(dev, NULL, GPIOD_OUT_HIGH); @@ -532,14 +543,12 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, hcd->fields[i] = f; } - udc->regs = devm_regmap_init_mmio(dev, hcd->base, - &isp1761_dc_regmap_conf); + udc->regs = devm_regmap_init_mmio(dev, hcd->base, dc_regmap); if (IS_ERR(udc->regs)) return PTR_ERR(udc->regs); for (i = 0; i < DC_FIELD_MAX; i++) { - f = devm_regmap_field_alloc(dev, udc->regs, - isp1761_dc_reg_fields[i]); + f = devm_regmap_field_alloc(dev, udc->regs, dc_reg_fields[i]); if (IS_ERR(f)) return PTR_ERR(f); @@ -562,7 +571,7 @@ int isp1760_register(struct resource *mem, int irq, unsigned long irqflags, return ret; } - if (IS_ENABLED(CONFIG_USB_ISP1761_UDC) && !udc_disabled) { + if (IS_ENABLED(CONFIG_USB_ISP1761_UDC) && udc_enabled) { ret = isp1760_udc_register(isp, irq, irqflags); if (ret < 0) { isp1760_hcd_unregister(hcd); diff --git a/drivers/usb/isp1760/isp1760-regs.h b/drivers/usb/isp1760/isp1760-regs.h index 4f632cbbbd1f..94ea60c20b2a 100644 --- a/drivers/usb/isp1760/isp1760-regs.h +++ b/drivers/usb/isp1760/isp1760-regs.h @@ -243,8 +243,50 @@ enum isp176x_device_controller_fields { DC_EPENABLE, DC_ENDPTYP, /* DC_FRAMENUM */ DC_FRAMENUM, DC_UFRAMENUM, + /* DC_CHIP_ID */ + DC_CHIP_ID_HIGH, DC_CHIP_ID_LOW, + /* DC_SCRATCH */ + DC_SCRATCH, /* Last element */ DC_FIELD_MAX, }; +/* ISP1763 */ +/* Initialization Registers */ +#define ISP1763_DC_ADDRESS 0x00 +#define ISP1763_DC_MODE 0x0c +#define ISP1763_DC_INTCONF 0x10 +#define ISP1763_DC_INTENABLE 0x14 + +/* Data Flow Registers */ +#define ISP1763_DC_EPMAXPKTSZ 0x04 +#define ISP1763_DC_EPTYPE 0x08 + +#define ISP1763_DC_BUFLEN 0x1c +#define ISP1763_DC_BUFSTAT 0x1e +#define ISP1763_DC_DATAPORT 0x20 + +#define ISP1763_DC_CTRLFUNC 0x28 +#define ISP1763_DC_EPINDEX 0x2c + +/* DMA Registers */ +#define ISP1763_DC_DMACMD 0x30 +#define ISP1763_DC_DMATXCOUNT 0x34 +#define ISP1763_DC_DMACONF 0x38 +#define ISP1763_DC_DMAHW 0x3c +#define ISP1763_DC_DMAINTREASON 0x50 +#define ISP1763_DC_DMAINTEN 0x54 +#define ISP1763_DC_DMAEP 0x58 +#define ISP1763_DC_DMABURSTCOUNT 0x64 + +/* General Registers */ +#define ISP1763_DC_INTERRUPT 0x18 +#define ISP1763_DC_CHIPID_LOW 0x70 +#define ISP1763_DC_CHIPID_HIGH 0x72 +#define ISP1763_DC_FRAMENUM 0x74 +#define ISP1763_DC_SCRATCH 0x78 +#define ISP1763_DC_UNLOCKDEV 0x7c +#define ISP1763_DC_INTPULSEWIDTH 0x80 +#define ISP1763_DC_TESTMODE 0x84 + #endif diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c index 30efc9d32506..3e05e3605435 100644 --- a/drivers/usb/isp1760/isp1760-udc.c +++ b/drivers/usb/isp1760/isp1760-udc.c @@ -1151,6 +1151,10 @@ static void isp1760_udc_disconnect(struct isp1760_udc *udc) static void isp1760_udc_init_hw(struct isp1760_udc *udc) { + u32 intconf = udc->is_isp1763 ? ISP1763_DC_INTCONF : ISP176x_DC_INTCONF; + u32 intena = udc->is_isp1763 ? ISP1763_DC_INTENABLE : + ISP176x_DC_INTENABLE; + /* * The device controller currently shares its interrupt with the host * controller, the DC_IRQ polarity and signaling mode are ignored. Set @@ -1160,11 +1164,11 @@ static void isp1760_udc_init_hw(struct isp1760_udc *udc) * ACK tokens only (and NYET for the out pipe). The default * configuration also generates an interrupt on the first NACK token. */ - isp1760_reg_write(udc->regs, ISP176x_DC_INTCONF, + isp1760_reg_write(udc->regs, intconf, ISP176x_DC_CDBGMOD_ACK | ISP176x_DC_DDBGMODIN_ACK | ISP176x_DC_DDBGMODOUT_ACK); - isp1760_reg_write(udc->regs, ISP176x_DC_INTENABLE, DC_IEPRXTX(7) | + isp1760_reg_write(udc->regs, intena, DC_IEPRXTX(7) | DC_IEPRXTX(6) | DC_IEPRXTX(5) | DC_IEPRXTX(4) | DC_IEPRXTX(3) | DC_IEPRXTX(2) | DC_IEPRXTX(1) | DC_IEPRXTX(0) | ISP176x_DC_IEP0SETUP | @@ -1304,13 +1308,14 @@ static int isp1760_udc_start(struct usb_gadget *gadget, static int isp1760_udc_stop(struct usb_gadget *gadget) { struct isp1760_udc *udc = gadget_to_udc(gadget); + u32 mode_reg = udc->is_isp1763 ? ISP1763_DC_MODE : ISP176x_DC_MODE; unsigned long flags; dev_dbg(udc->isp->dev, "%s\n", __func__); del_timer_sync(&udc->vbus_timer); - isp1760_reg_write(udc->regs, ISP176x_DC_MODE, 0); + isp1760_reg_write(udc->regs, mode_reg, 0); spin_lock_irqsave(&udc->lock, flags); udc->driver = NULL; @@ -1332,15 +1337,30 @@ static const struct usb_gadget_ops isp1760_udc_ops = { * Interrupt Handling */ +static u32 isp1760_udc_irq_get_status(struct isp1760_udc *udc) +{ + u32 status; + + if (udc->is_isp1763) { + status = isp1760_reg_read(udc->regs, ISP1763_DC_INTERRUPT) + & isp1760_reg_read(udc->regs, ISP1763_DC_INTENABLE); + isp1760_reg_write(udc->regs, ISP1763_DC_INTERRUPT, status); + } else { + status = isp1760_reg_read(udc->regs, ISP176x_DC_INTERRUPT) + & isp1760_reg_read(udc->regs, ISP176x_DC_INTENABLE); + isp1760_reg_write(udc->regs, ISP176x_DC_INTERRUPT, status); + } + + return status; +} + static irqreturn_t isp1760_udc_irq(int irq, void *dev) { struct isp1760_udc *udc = dev; unsigned int i; u32 status; - status = isp1760_reg_read(udc->regs, ISP176x_DC_INTERRUPT) - & isp1760_reg_read(udc->regs, ISP176x_DC_INTENABLE); - isp1760_reg_write(udc->regs, ISP176x_DC_INTERRUPT, status); + status = isp1760_udc_irq_get_status(udc); if (status & DC_IEVBUS) { dev_dbg(udc->isp->dev, "%s(VBUS)\n", __func__); @@ -1475,6 +1495,7 @@ static void isp1760_udc_init_eps(struct isp1760_udc *udc) static int isp1760_udc_init(struct isp1760_udc *udc) { + u32 mode_reg = udc->is_isp1763 ? ISP1763_DC_MODE : ISP176x_DC_MODE; u16 scratch; u32 chipid; @@ -1484,9 +1505,10 @@ static int isp1760_udc_init(struct isp1760_udc *udc) * register, and reading the scratch register value back. The chip ID * and scratch register contents must match the expected values. */ - isp1760_reg_write(udc->regs, ISP176x_DC_SCRATCH, 0xbabe); - chipid = isp1760_reg_read(udc->regs, ISP176x_DC_CHIPID); - scratch = isp1760_reg_read(udc->regs, ISP176x_DC_SCRATCH); + isp1760_udc_write(udc, DC_SCRATCH, 0xbabe); + chipid = isp1760_udc_read(udc, DC_CHIP_ID_HIGH) << 16; + chipid |= isp1760_udc_read(udc, DC_CHIP_ID_LOW); + scratch = isp1760_udc_read(udc, DC_SCRATCH); if (scratch != 0xbabe) { dev_err(udc->isp->dev, @@ -1495,7 +1517,8 @@ static int isp1760_udc_init(struct isp1760_udc *udc) return -ENODEV; } - if (chipid != 0x00011582 && chipid != 0x00158210) { + if (chipid != 0x00011582 && chipid != 0x00158210 && + chipid != 0x00176320) { dev_err(udc->isp->dev, "udc: invalid chip ID 0x%08x\n", chipid); return -ENODEV; } @@ -1503,7 +1526,7 @@ static int isp1760_udc_init(struct isp1760_udc *udc) /* Reset the device controller. */ isp1760_udc_set(udc, DC_SFRESET); usleep_range(10000, 11000); - isp1760_reg_write(udc->regs, ISP176x_DC_MODE, 0); + isp1760_reg_write(udc->regs, mode_reg, 0); usleep_range(10000, 11000); return 0; diff --git a/drivers/usb/isp1760/isp1760-udc.h b/drivers/usb/isp1760/isp1760-udc.h index f2ab5929cc9f..22044e86bc0e 100644 --- a/drivers/usb/isp1760/isp1760-udc.h +++ b/drivers/usb/isp1760/isp1760-udc.h @@ -84,6 +84,7 @@ struct isp1760_udc { u16 ep0_length; bool connected; + bool is_isp1763; unsigned int devstatus; };

[v4,9/9] usb: isp1763: add peripheral mode

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