From patchwork Wed Jan 13 15:12:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lauri Kasanen X-Patchwork-Id: 362440 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1259C4332E for ; Wed, 13 Jan 2021 15:15:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6FEDC2339F for ; Wed, 13 Jan 2021 15:15:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727102AbhAMPPC (ORCPT ); Wed, 13 Jan 2021 10:15:02 -0500 Received: from mout.gmx.net ([212.227.15.18]:46697 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726884AbhAMPPB (ORCPT ); Wed, 13 Jan 2021 10:15:01 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1610550806; bh=V2H1LQMFORpJ3T6RKLvfoJKZ/snyAYsiqh5441bb8M0=; h=X-UI-Sender-Class:Date:From:To:Cc:Subject; b=beyjTFwbog9PcAPws51tsITMe7r/2iD6biAw71LRCXYK107F6gTNRvbsBXRPTIJpA HhVG0ZhKRLjZbkh54K/WqWjvWBfXuhd2ExPQIgHZkiu4+2ElHQTH01H++4P3FobO7A ER0sDf3M9Re/QztL+cOTZHKTRBEed04HIV4/CkPI= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from Valinor ([82.203.161.65]) by mail.gmx.com (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1N3KTo-1jzncq0Rta-010NLP; Wed, 13 Jan 2021 16:13:26 +0100 Date: Wed, 13 Jan 2021 17:12:36 +0200 From: Lauri Kasanen To: linux-mips@vger.kernel.org Cc: tsbogend@alpha.franken.de, dmitry.torokhov@gmail.com, linux-input@vger.kernel.org Subject: [PATCH 4/6 v6] input: Add N64 controller driver Message-Id: <20210113171236.c22d14ff656dba3d21910c45@gmx.com> X-Mailer: Sylpheed 3.5.0 (GTK+ 2.18.6; x86_64-unknown-linux-gnu) Mime-Version: 1.0 X-Provags-ID: V03:K1:s/Q5eAR5yB2r0cnHgQgNVEapiWggeDm3m22VvyO64NrVM8Pd8M0 ps6eFDLqO7q4dcH93WU8fv4oZBXQ26bAVUoDmYkv0MUcQFHD+FfG2TOYN/LcA+NueBO4Tal eNhl34Tgc9DHelq279ykIm/jZ4Vea1qL0Vy5TbHNUcNg+WNyAKSLqnj899kCDR5DnvaXhk7 biyG+kKq+aW/85z7bLxtg== X-UI-Out-Filterresults: notjunk:1; V03:K0:UYyUa50UhtU=:2phw2q0QiJFLABflJds36h 49cqwL6szlM/7ECruWFEacRCDJw8t5ozJgfDpaYK5CV2GU3guj7dIh4YmZpcSS38SX/oJxosP 1L6uPBdl48A7BMAoDsvDgoOzh5P3AdSLOxmEdHuTBz5k8aJo5RQS/jJ6BUKdF8DYvrXUuy8YH 5W7iy7AsGPD9eaoRg76gGGfv9poSv+7ZcpJ0C3Zbox8OC+lKq6rNXQ2TN/G9uYVqyv3tUCAcD VJkw9LrlfqOXSk06YNMA4OuY4KpUxv3YEF7wi+i3kXw026KKMTBa35E0bOhdeHxLBcjrKmH5p GkuRUY2MCkXsEgEQF7DxYpJCOg4SYNI66i3Hrex2CdWCbzbap6wkOy2K/UOcBoi3X9ZmymJq8 MP5hLsi2beMymKVZ0Ohuw0QDbZRoVWApvUmaxjiLiMX5GmLAUm+4cq/4UwBW1XSDVR9ts6p0S kYLg8ueR2pu/n7/pJNfmO0GC45Bh84g6pDxL1HrSioVdj2VRGmMIKlA+CDsMP1mipjzUxdb5k CM53TGOxWRYzZLDrhM5dewBpTtR/qCEgfZtSzLhHPF9H5fkdnSzV3mQRdTdpv42v8srHg7K6/ veSoFzakcJbjRDCsWNPLaNbWleklfdMjvPlAcVaDGWU4Il9eZ8qxlYBXBOEs+arBV9XboHLe8 86HI+mY+VA078ME6VhgvcsllIZlrOjEN69zVPpyAZ2xV43okDayu/1RO8X+ueLorLjAf7S7Vj DRJ0oYtOhgD5mxDlIN4kNBBou5O1IgEs/wrBSoL25FGhB/LRZE7UsMq2U69fjtt7Bog28ciEZ P6N1vLCzYxZra9qUPSeFV/e8DpBYKXfcL8n/sXp2M+Vc0QLdUXOR9GPlTp2kpwJSJRf7PMJax gCudQODQ/iOgoTmWSqGQ== Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This adds support for the four built-in controller ports on the Nintendo 64 console. The N64 controller includes an analog stick, a d-pad, and several buttons. No module support as the target has only 8mb ram. Signed-off-by: Lauri Kasanen --- drivers/input/joystick/Kconfig | 6 + drivers/input/joystick/Makefile | 2 +- drivers/input/joystick/n64joy.c | 345 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 352 insertions(+), 1 deletion(-) create mode 100644 drivers/input/joystick/n64joy.c -- 2.6.2 diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig index b080f0c..e1a8128 100644 --- a/drivers/input/joystick/Kconfig +++ b/drivers/input/joystick/Kconfig @@ -382,4 +382,10 @@ config JOYSTICK_FSIA6B To compile this driver as a module, choose M here: the module will be called fsia6b. +config JOYSTICK_N64 + bool "N64 controller" + depends on MACH_NINTENDO64 + help + Support for the four N64 controllers. + endif diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile index 58232b3..31d720c 100644 --- a/drivers/input/joystick/Makefile +++ b/drivers/input/joystick/Makefile @@ -24,6 +24,7 @@ obj-$(CONFIG_JOYSTICK_INTERACT) += interact.o obj-$(CONFIG_JOYSTICK_JOYDUMP) += joydump.o obj-$(CONFIG_JOYSTICK_MAGELLAN) += magellan.o obj-$(CONFIG_JOYSTICK_MAPLE) += maplecontrol.o +obj-$(CONFIG_JOYSTICK_N64) += n64joy.o obj-$(CONFIG_JOYSTICK_PSXPAD_SPI) += psxpad-spi.o obj-$(CONFIG_JOYSTICK_PXRC) += pxrc.o obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o @@ -37,4 +38,3 @@ obj-$(CONFIG_JOYSTICK_WARRIOR) += warrior.o obj-$(CONFIG_JOYSTICK_WALKERA0701) += walkera0701.o obj-$(CONFIG_JOYSTICK_XPAD) += xpad.o obj-$(CONFIG_JOYSTICK_ZHENHUA) += zhenhua.o - diff --git a/drivers/input/joystick/n64joy.c b/drivers/input/joystick/n64joy.c new file mode 100644 index 0000000..e7650c5 --- /dev/null +++ b/drivers/input/joystick/n64joy.c @@ -0,0 +1,345 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Support for the four N64 controllers. + * + * Copyright (c) 2021 Lauri Kasanen + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Lauri Kasanen "); +MODULE_DESCRIPTION("Driver for N64 controllers"); +MODULE_LICENSE("GPL"); + +#define PIF_RAM 0x1fc007c0 + +#define SI_DRAM_REG 0 +#define SI_READ_REG 1 +#define SI_WRITE_REG 4 +#define SI_STATUS_REG 6 + +#define SI_STATUS_DMA_BUSY BIT(0) +#define SI_STATUS_IO_BUSY BIT(1) + +#define N64_CONTROLLER_ID 0x0500 + +#define MAX_CONTROLLERS 4 + +static const char *n64joy_phys[MAX_CONTROLLERS] = { + "n64joy/port0", + "n64joy/port1", + "n64joy/port2", + "n64joy/port3", +}; + +struct n64joy_priv { + u64 si_buf[8] ____cacheline_aligned; + struct timer_list timer; + struct mutex n64joy_mutex; + struct input_dev *n64joy_dev[MAX_CONTROLLERS]; + u32 __iomem *reg_base; + u8 n64joy_opened; +}; + +struct joydata { + unsigned: 16; // unused + unsigned err: 2; + unsigned: 14; // unused + + union { + u32 data; + + struct { + unsigned a: 1; + unsigned b: 1; + unsigned z: 1; + unsigned start: 1; + unsigned up: 1; + unsigned down: 1; + unsigned left: 1; + unsigned right: 1; + unsigned: 2; // unused + unsigned l: 1; + unsigned r: 1; + unsigned c_up: 1; + unsigned c_down: 1; + unsigned c_left: 1; + unsigned c_right: 1; + signed x: 8; + signed y: 8; + }; + }; +}; + +static void n64joy_write_reg(u32 __iomem *reg_base, const u8 reg, const u32 value) +{ + writel(value, reg_base + reg); +} + +static u32 n64joy_read_reg(u32 __iomem *reg_base, const u8 reg) +{ + return readl(reg_base + reg); +} + +static void n64joy_wait_si_dma(u32 __iomem *reg_base) +{ + while (n64joy_read_reg(reg_base, SI_STATUS_REG) & + (SI_STATUS_DMA_BUSY | SI_STATUS_IO_BUSY)) + cpu_relax(); +} + +static void n64joy_exec_pif(struct n64joy_priv *priv, const u64 in[8]) +{ + unsigned long flags; + + dma_cache_wback_inv((unsigned long) in, 8 * 8); + dma_cache_inv((unsigned long) priv->si_buf, 8 * 8); + + local_irq_save(flags); + + n64joy_wait_si_dma(priv->reg_base); + + barrier(); + n64joy_write_reg(priv->reg_base, SI_DRAM_REG, virt_to_phys(in)); + barrier(); + n64joy_write_reg(priv->reg_base, SI_WRITE_REG, PIF_RAM); + barrier(); + + n64joy_wait_si_dma(priv->reg_base); + + barrier(); + n64joy_write_reg(priv->reg_base, SI_DRAM_REG, virt_to_phys(priv->si_buf)); + barrier(); + n64joy_write_reg(priv->reg_base, SI_READ_REG, PIF_RAM); + barrier(); + + n64joy_wait_si_dma(priv->reg_base); + + local_irq_restore(flags); +} + +static const u64 polldata[] ____cacheline_aligned = { + 0xff010401ffffffff, + 0xff010401ffffffff, + 0xff010401ffffffff, + 0xff010401ffffffff, + 0xfe00000000000000, + 0, + 0, + 1 +}; + +static void n64joy_poll(struct timer_list *t) +{ + const struct joydata *data; + struct n64joy_priv *priv = container_of(t, struct n64joy_priv, timer); + struct input_dev *dev; + u32 i; + + n64joy_exec_pif(priv, polldata); + + data = (struct joydata *) priv->si_buf; + + for (i = 0; i < MAX_CONTROLLERS; i++) { + if (!priv->n64joy_dev[i]) + continue; + + dev = priv->n64joy_dev[i]; + + // d-pad + input_report_key(dev, BTN_DPAD_UP, data[i].up); + input_report_key(dev, BTN_DPAD_DOWN, data[i].down); + input_report_key(dev, BTN_DPAD_LEFT, data[i].left); + input_report_key(dev, BTN_DPAD_RIGHT, data[i].right); + + // c buttons + input_report_key(dev, BTN_FORWARD, data[i].c_up); + input_report_key(dev, BTN_BACK, data[i].c_down); + input_report_key(dev, BTN_LEFT, data[i].c_left); + input_report_key(dev, BTN_RIGHT, data[i].c_right); + + // matching buttons + input_report_key(dev, BTN_START, data[i].start); + input_report_key(dev, BTN_Z, data[i].z); + + // remaining ones: a, b, l, r + input_report_key(dev, BTN_0, data[i].a); + input_report_key(dev, BTN_1, data[i].b); + input_report_key(dev, BTN_2, data[i].l); + input_report_key(dev, BTN_3, data[i].r); + + input_report_abs(dev, ABS_X, data[i].x); + input_report_abs(dev, ABS_Y, data[i].y); + + input_sync(dev); + } + + mod_timer(&priv->timer, jiffies + msecs_to_jiffies(16)); +} + +static int n64joy_open(struct input_dev *dev) +{ + struct n64joy_priv *priv = input_get_drvdata(dev); + int err; + + err = mutex_lock_interruptible(&priv->n64joy_mutex); + if (err) + return err; + + if (!priv->n64joy_opened) { + // Could use the vblank irq, but it's not important if the poll + // point slightly changes. + timer_setup(&priv->timer, n64joy_poll, 0); + mod_timer(&priv->timer, jiffies + msecs_to_jiffies(16)); + } + + priv->n64joy_opened++; + + mutex_unlock(&priv->n64joy_mutex); + return err; +} + +static void n64joy_close(struct input_dev *dev) +{ + struct n64joy_priv *priv = input_get_drvdata(dev); + + mutex_lock(&priv->n64joy_mutex); + if (!--priv->n64joy_opened) + del_timer_sync(&priv->timer); + mutex_unlock(&priv->n64joy_mutex); +} + +static const u64 __initconst scandata[] ____cacheline_aligned = { + 0xff010300ffffffff, + 0xff010300ffffffff, + 0xff010300ffffffff, + 0xff010300ffffffff, + 0xfe00000000000000, + 0, + 0, + 1 +}; + +/* + * The target device is embedded and RAM-constrained. We save RAM + * by initializing in __init code that gets dropped late in boot. + * For the same reason there is no module or unloading support. + */ +static int __init n64joy_probe(struct platform_device *pdev) +{ + const struct joydata *data; + struct resource *res; + struct n64joy_priv *priv; + struct input_dev *dev; + unsigned long len; + int err = 0; + u32 i, j, found = 0; + + priv = kzalloc(sizeof(struct n64joy_priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + mutex_init(&priv->n64joy_mutex); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + len = res->end - res->start + 1; + priv->reg_base = ioremap(res->start, len); + + // The controllers are not hotpluggable, so we can scan in init + n64joy_exec_pif(priv, scandata); + + data = (struct joydata *) priv->si_buf; + + for (i = 0; i < MAX_CONTROLLERS; i++) { + if (!data[i].err && data[i].data >> 16 == N64_CONTROLLER_ID) { + found++; + + dev = priv->n64joy_dev[i] = input_allocate_device(); + if (!priv->n64joy_dev[i]) { + err = -ENOMEM; + goto fail; + } + + input_set_drvdata(dev, priv); + + dev->name = "N64 controller"; + dev->phys = n64joy_phys[i]; + dev->id.bustype = BUS_HOST; + dev->id.vendor = 0; + dev->id.product = data[i].data >> 16; + dev->id.version = 0; + + dev->open = n64joy_open; + dev->close = n64joy_close; + + // d-pad + input_set_capability(dev, EV_KEY, BTN_DPAD_UP); + input_set_capability(dev, EV_KEY, BTN_DPAD_DOWN); + input_set_capability(dev, EV_KEY, BTN_DPAD_LEFT); + input_set_capability(dev, EV_KEY, BTN_DPAD_RIGHT); + // c buttons + input_set_capability(dev, EV_KEY, BTN_LEFT); + input_set_capability(dev, EV_KEY, BTN_RIGHT); + input_set_capability(dev, EV_KEY, BTN_FORWARD); + input_set_capability(dev, EV_KEY, BTN_BACK); + // matching buttons + input_set_capability(dev, EV_KEY, BTN_START); + input_set_capability(dev, EV_KEY, BTN_Z); + // remaining ones: a, b, l, r + input_set_capability(dev, EV_KEY, BTN_0); + input_set_capability(dev, EV_KEY, BTN_1); + input_set_capability(dev, EV_KEY, BTN_2); + input_set_capability(dev, EV_KEY, BTN_3); + + for (j = 0; j < 2; j++) { + input_set_abs_params(dev, ABS_X + j, + S8_MIN, S8_MAX, 0, 0); + } + + err = input_register_device(dev); + if (err) { + input_free_device(dev); + goto fail; + } + } + } + + pr_info("%u controller(s) connected\n", found); + + if (!found) + return -ENODEV; + + return 0; +fail: + iounmap(priv->reg_base); + + for (i = 0; i < MAX_CONTROLLERS; i++) { + if (!priv->n64joy_dev[i]) + continue; + input_unregister_device(priv->n64joy_dev[i]); + } + return err; +} + +static struct platform_driver n64joy_driver = { + .driver = { + .name = "n64joy", + }, +}; + +static int __init n64joy_init(void) +{ + return platform_driver_probe(&n64joy_driver, n64joy_probe); +} + +module_init(n64joy_init);