From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Brandt Subject: [PATCH v4 1/3] usb: renesas_usbhs: Add support for RZ/A1 Date: Mon, 8 Jan 2018 07:30:53 -0500 Message-ID: <20180108123055.64890-2-chris.brandt@renesas.com> References: <20180108123055.64890-1-chris.brandt@renesas.com> Return-path: In-Reply-To: <20180108123055.64890-1-chris.brandt-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Greg Kroah-Hartman , Rob Herring , Mark Rutland , Simon Horman Cc: linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-renesas-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Geert Uytterhoeven , Sergei Shtylyov , Chris Brandt List-Id: devicetree@vger.kernel.org This patch adds the capability to support RZ/A1 SoCs. Signed-off-by: Chris Brandt --- v2: * Removed "renesas,usbhs-r7s72100" * Changed license of rza.c --- drivers/usb/renesas_usbhs/Makefile | 2 +- drivers/usb/renesas_usbhs/common.c | 13 ++++++++++ drivers/usb/renesas_usbhs/common.h | 6 +++++ drivers/usb/renesas_usbhs/rza.c | 52 ++++++++++++++++++++++++++++++++++++++ drivers/usb/renesas_usbhs/rza.h | 4 +++ include/linux/usb/renesas_usbhs.h | 1 + 6 files changed, 77 insertions(+), 1 deletion(-) create mode 100644 drivers/usb/renesas_usbhs/rza.c create mode 100644 drivers/usb/renesas_usbhs/rza.h diff --git a/drivers/usb/renesas_usbhs/Makefile b/drivers/usb/renesas_usbhs/Makefile index fac147a3ad23..5c5b51bb48ef 100644 --- a/drivers/usb/renesas_usbhs/Makefile +++ b/drivers/usb/renesas_usbhs/Makefile @@ -5,7 +5,7 @@ obj-$(CONFIG_USB_RENESAS_USBHS) += renesas_usbhs.o -renesas_usbhs-y := common.o mod.o pipe.o fifo.o rcar2.o rcar3.o +renesas_usbhs-y := common.o mod.o pipe.o fifo.o rcar2.o rcar3.o rza.o ifneq ($(CONFIG_USB_RENESAS_USBHS_HCD),) renesas_usbhs-y += mod_host.o diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c index c5289b3ecf8d..4310df46639d 100644 --- a/drivers/usb/renesas_usbhs/common.c +++ b/drivers/usb/renesas_usbhs/common.c @@ -17,6 +17,7 @@ #include "common.h" #include "rcar2.h" #include "rcar3.h" +#include "rza.h" /* * image of renesas_usbhs @@ -488,6 +489,10 @@ static const struct of_device_id usbhs_of_match[] = { .compatible = "renesas,rcar-gen3-usbhs", .data = (void *)USBHS_TYPE_RCAR_GEN3, }, + { + .compatible = "renesas,rza1-usbhs", + .data = (void *)USBHS_TYPE_RZA1, + }, { }, }; MODULE_DEVICE_TABLE(of, usbhs_of_match); @@ -520,6 +525,11 @@ static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev) dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe); } + if (dparam->type == USBHS_TYPE_RZA1) { + dparam->pipe_configs = usbhsc_new_pipe; + dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe); + } + return info; } @@ -591,6 +601,9 @@ static int usbhs_probe(struct platform_device *pdev) dev_err(&pdev->dev, "no notifier registered\n"); } break; + case USBHS_TYPE_RZA1: + priv->pfunc = usbhs_rza1_ops; + break; default: if (!info->platform_callback.get_id) { dev_err(&pdev->dev, "no platform callbacks"); diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h index c9747f064601..f619afeae2b8 100644 --- a/drivers/usb/renesas_usbhs/common.h +++ b/drivers/usb/renesas_usbhs/common.h @@ -98,6 +98,7 @@ struct usbhs_priv; #define D2FIFOCTR 0x00F2 /* for R-Car Gen2 */ #define D3FIFOSEL 0x00F4 /* for R-Car Gen2 */ #define D3FIFOCTR 0x00F6 /* for R-Car Gen2 */ +#define SUSPMODE 0x0102 /* for RZ/A */ /* SYSCFG */ #define SCKE (1 << 10) /* USB Module Clock Enable */ @@ -106,6 +107,8 @@ struct usbhs_priv; #define DRPD (1 << 5) /* D+ Line/D- Line Resistance Control */ #define DPRPU (1 << 4) /* D+ Line Resistance Control */ #define USBE (1 << 0) /* USB Module Operation Enable */ +#define UCKSEL (1 << 2) /* Clock Select for RZ/A1 */ +#define UPLLE (1 << 1) /* USB PLL Enable for RZ/A1 */ /* DVSTCTR */ #define EXTLP (1 << 10) /* Controls the EXTLP pin output state */ @@ -233,6 +236,9 @@ struct usbhs_priv; #define USBSPD_SPEED_FULL 0x2 #define USBSPD_SPEED_HIGH 0x3 +/* SUSPMODE */ +#define SUSPM (1 << 14) /* SuspendM Control */ + /* * struct */ diff --git a/drivers/usb/renesas_usbhs/rza.c b/drivers/usb/renesas_usbhs/rza.c new file mode 100644 index 000000000000..5b287257ec11 --- /dev/null +++ b/drivers/usb/renesas_usbhs/rza.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Renesas USB driver RZ/A initialization and power control + * + * Copyright (C) 2018 Chris Brandt + * Copyright (C) 2018 Renesas Electronics Corporation + */ + +#include +#include +#include +#include "common.h" +#include "rza.h" + +static int usbhs_rza1_hardware_init(struct platform_device *pdev) +{ + struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); + struct device_node *usb_x1_clk, *extal_clk; + u32 freq_usb = 0, freq_extal = 0; + + /* Input Clock Selection (NOTE: ch0 controls both ch0 and ch1) */ + usb_x1_clk = of_find_node_by_name(NULL, "usb_x1"); + extal_clk = of_find_node_by_name(NULL, "extal"); + of_property_read_u32(usb_x1_clk, "clock-frequency", &freq_usb); + of_property_read_u32(extal_clk, "clock-frequency", &freq_extal); + if (freq_usb == 0) { + if (freq_extal == 12000000) { + /* Select 12MHz XTAL */ + usbhs_bset(priv, SYSCFG, UCKSEL, UCKSEL); + } else { + dev_err(usbhs_priv_to_dev(priv), "A 48MHz USB clock or 12MHz main clock is required.\n"); + return -EIO; + } + } + + /* Enable USB PLL (NOTE: ch0 controls both ch0 and ch1) */ + usbhs_bset(priv, SYSCFG, UPLLE, UPLLE); + udelay(1000); + usbhs_bset(priv, SUSPMODE, SUSPM, SUSPM); + + return 0; +} + +static int usbhs_rza_get_id(struct platform_device *pdev) +{ + return USBHS_GADGET; +} + +const struct renesas_usbhs_platform_callback usbhs_rza1_ops = { + .hardware_init = usbhs_rza1_hardware_init, + .get_id = usbhs_rza_get_id, +}; diff --git a/drivers/usb/renesas_usbhs/rza.h b/drivers/usb/renesas_usbhs/rza.h new file mode 100644 index 000000000000..ca917ca54f6d --- /dev/null +++ b/drivers/usb/renesas_usbhs/rza.h @@ -0,0 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 +#include "common.h" + +extern const struct renesas_usbhs_platform_callback usbhs_rza1_ops; diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h index 9482735d4ca5..53924f8e840c 100644 --- a/include/linux/usb/renesas_usbhs.h +++ b/include/linux/usb/renesas_usbhs.h @@ -195,6 +195,7 @@ struct renesas_usbhs_driver_param { #define USBHS_TYPE_RCAR_GEN2 1 #define USBHS_TYPE_RCAR_GEN3 2 #define USBHS_TYPE_RCAR_GEN3_WITH_PLL 3 +#define USBHS_TYPE_RZA1 4 /* * option: -- 2.15.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html