From patchwork Thu Jul 12 14:18:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Simek X-Patchwork-Id: 943062 X-Patchwork-Delegate: monstr@monstr.eu Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=xilinx.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=monstr-eu.20150623.gappssmtp.com header.i=@monstr-eu.20150623.gappssmtp.com header.b="Nbhh3vaX"; dkim-atps=neutral Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 41RJ1w6FPWz9rxx for ; Fri, 13 Jul 2018 00:18:12 +1000 (AEST) Received: by lists.denx.de (Postfix, from userid 105) id F3967C21FEA; Thu, 12 Jul 2018 14:18:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=RCVD_IN_MSPIKE_H2, T_DKIM_INVALID autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id 6EA09C21E6A; Thu, 12 Jul 2018 14:18:04 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 60DBBC21E6A; Thu, 12 Jul 2018 14:18:03 +0000 (UTC) Received: from mail-wr1-f67.google.com (mail-wr1-f67.google.com [209.85.221.67]) by lists.denx.de (Postfix) with ESMTPS id 08BC5C21BE5 for ; Thu, 12 Jul 2018 14:18:03 +0000 (UTC) Received: by mail-wr1-f67.google.com with SMTP id c4-v6so9223471wrs.12 for ; Thu, 12 Jul 2018 07:18:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monstr-eu.20150623.gappssmtp.com; s=20150623; h=sender:from:to:cc:subject:date:message-id; bh=O5HBEyzJdhxqmmdz7zdJmcrrxuRIQUAajUkdC/2PGLM=; b=Nbhh3vaX+Gy7kir+XLoZYKq928vwIY+wXTUBpcLhYkmqfKl4w/uxvsLbUdDXI5ElHW aeCrHBqe7+caXAY8b8JqwfjbNoWBtFr7yEIpmz9deFrb1UnjSDV94PKFgyoCz/KvHIJw zQp2rwdyQxMIw5wl3lNiMdKBEDs27ovNKT3+EoLXtk9GfLuQw6+Ts9vXNeZWPRe9WxqU /0z5rF+JhviLenNn2DOdrVy2KDXeSo8ju/kqE3A9jYPrRhPvTqX/kpOAOd6Xhx8t1cjE jNiJUxBuWh+5JjWjiF4+tD4DcAyIw6KHHHfMx31sxK8qdZKppFUKxjk+q3cglb2D8AFg /Gyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id; bh=O5HBEyzJdhxqmmdz7zdJmcrrxuRIQUAajUkdC/2PGLM=; b=qk5qtBVkwTrMC6GjTLJB+8Lytor9G9mT6+C9IZhrvDsRIzA0/kYV0FBSBJWf9DKn9g 8Pd/DW8FYPygC5UFJ1rsKOYrKZK11j/1mDLkaLWcTOV4ySVqsTrtZrh9nuOrqn7g0/Gd Q9orBjyT0eTCoz0eEvqCPLT8U1Z61gQGTixYCW1kaZ6/LoqnXsI2jzZnu5HZXks8Gjde QZ8F4nyoVQllMEK44RaVn1LP8Fa7fYZ5YJzXgqQj61G5p5yuDDF88TKYvdsUENqlQHrE RV3iEWMKZJELgy5JqhItbNKv8h3dLDbk6ZoHuoBhJKJRyA/7+IbGnHJApbljAog/tp/e 790w== X-Gm-Message-State: AOUpUlGvgZYUwDJEysLYA41O2hxp/7ibbf8sL8dHBV0SschaesSVZ5kA lbdfQZLCrEscJS3iTRmVN8inquhl X-Google-Smtp-Source: AAOMgpdHcVHxU4zMGVJE/htHxxUVizukojlKjaqbEWDBTC3N/atRiAGXveo+yPwxbufaazleWzmtvQ== X-Received: by 2002:a5d:4b90:: with SMTP id b16-v6mr1857319wrt.168.1531405082460; Thu, 12 Jul 2018 07:18:02 -0700 (PDT) Received: from localhost (nat-35.starnet.cz. [178.255.168.35]) by smtp.gmail.com with ESMTPSA id s10-v6sm7299506wmb.12.2018.07.12.07.18.01 (version=TLS1_2 cipher=AES128-SHA bits=128/128); Thu, 12 Jul 2018 07:18:01 -0700 (PDT) From: Michal Simek To: u-boot@lists.denx.de Date: Thu, 12 Jul 2018 16:18:00 +0200 Message-Id: X-Mailer: git-send-email 1.9.1 Subject: [U-Boot] [PATCH] gpio: xilinx: Convert driver to DM X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" This patch is enabling GPIO_DM support to have an option to use this driver together with zynq gpio driver. !DM part is kept there till Microblaze is cleanup which will be done hopefully soon. Just a note: There is no reason to initialize uc-priv->name because it is completely unused. Signed-off-by: Michal Simek --- drivers/gpio/xilinx_gpio.c | 225 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 224 insertions(+), 1 deletion(-) diff --git a/drivers/gpio/xilinx_gpio.c b/drivers/gpio/xilinx_gpio.c index 74c5be0865d1..ca33473042d7 100644 --- a/drivers/gpio/xilinx_gpio.c +++ b/drivers/gpio/xilinx_gpio.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0+ /* - * Copyright (c) 2013 Xilinx, Michal Simek + * Copyright (c) 2013 - 2018 Xilinx, Michal Simek */ #include @@ -9,6 +9,7 @@ #include #include #include +#include static LIST_HEAD(gpio_list); @@ -23,6 +24,8 @@ struct gpio_regs { u32 gpiodir; }; +#if !defined(CONFIG_DM_GPIO) + #define GPIO_NAME_SIZE 10 struct gpio_names { @@ -345,3 +348,223 @@ int gpio_alloc_dual(u32 baseaddr, const char *name, u32 gpio_no0, u32 gpio_no1) /* Return the first gpio allocated for this device */ return ret; } +#else +#define XILINX_GPIO_MAX_BANK 2 + +struct xilinx_gpio_platdata { + struct gpio_regs *regs; + int bank_max[XILINX_GPIO_MAX_BANK]; + int bank_input[XILINX_GPIO_MAX_BANK]; + int bank_output[XILINX_GPIO_MAX_BANK]; +}; + +static int xilinx_gpio_get_bank_pin(unsigned offset, u32 *bank_num, + u32 *bank_pin_num, struct udevice *dev) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + u32 bank, max_pins; + /* the first gpio is 0 not 1 */ + u32 pin_num = offset; + + for (bank = 0; bank < XILINX_GPIO_MAX_BANK; bank++) { + max_pins = platdata->bank_max[bank]; + if (pin_num < max_pins) { + debug("%s: found at bank 0x%x pin 0x%x\n", __func__, + bank, pin_num); + *bank_num = bank; + *bank_pin_num = pin_num; + return 0; + } + pin_num -= max_pins; + } + + return -EINVAL; +} + +static int xilinx_gpio_set_value(struct udevice *dev, unsigned offset, + int value) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + int val, ret; + u32 bank, pin; + + ret = xilinx_gpio_get_bank_pin(offset, &bank, &pin, dev); + if (ret) + return ret; + + debug("%s: regs: %lx, gpio: %x, bank %x, pin %x\n", __func__, + (ulong)platdata->regs, offset, bank, pin); + + if (value) { + val = readl(&platdata->regs->gpiodata + bank * 2); + val = val | (1 << pin); + writel(val, &platdata->regs->gpiodata + bank * 2); + } else { + val = readl(&platdata->regs->gpiodata + bank * 2); + val = val & ~(1 << pin); + writel(val, &platdata->regs->gpiodata + bank * 2); + } + + return val; +}; + +static int xilinx_gpio_get_value(struct udevice *dev, unsigned offset) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + int val, ret; + u32 bank, pin; + + ret = xilinx_gpio_get_bank_pin(offset, &bank, &pin, dev); + if (ret) + return ret; + + debug("%s: regs: %lx, gpio: %x, bank %x, pin %x\n", __func__, + (ulong)platdata->regs, offset, bank, pin); + + val = readl(&platdata->regs->gpiodata + bank * 2); + val = !!(val & (1 << pin)); + + return val; +}; + +static int xilinx_gpio_get_function(struct udevice *dev, unsigned offset) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + int val, ret; + u32 bank, pin; + + /* Check if all pins are inputs */ + if (platdata->bank_input[bank]) + return GPIOF_INPUT; + + /* Check if all pins are outputs */ + if (platdata->bank_output[bank]) + return GPIOF_OUTPUT; + + ret = xilinx_gpio_get_bank_pin(offset, &bank, &pin, dev); + if (ret) + return ret; + + /* FIXME test on dual */ + val = readl(&platdata->regs->gpiodir + bank * 2); + val = !(val & (1 << pin)); + + /* input is 1 in reg but GPIOF_INPUT is 0 */ + /* output is 0 in reg but GPIOF_OUTPUT is 1 */ + + return val; +} + +static int xilinx_gpio_direction_output(struct udevice *dev, unsigned offset, + int value) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + int val, ret; + u32 bank, pin; + + ret = xilinx_gpio_get_bank_pin(offset, &bank, &pin, dev); + if (ret) + return ret; + + /* can't change it if all is input by default */ + if (platdata->bank_input[bank]) + return -EINVAL; + + if (!platdata->bank_output[bank]) { + val = readl(&platdata->regs->gpiodir + bank * 2); + val = val & ~(1 << pin); + writel(val, &platdata->regs->gpiodir + bank * 2); + } + + xilinx_gpio_set_value(dev, offset, value); + + return 0; +} + +static int xilinx_gpio_direction_input(struct udevice *dev, unsigned offset) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + int val, ret; + u32 bank, pin; + + ret = xilinx_gpio_get_bank_pin(offset, &bank, &pin, dev); + if (ret) + return ret; + + /* Already input */ + if (platdata->bank_input[bank]) + return 0; + + /* can't change it if all is output by default */ + if (platdata->bank_output[bank]) + return -EINVAL; + + val = readl(&platdata->regs->gpiodir + bank * 2); + val = val | (1 << pin); + writel(val, &platdata->regs->gpiodir + bank * 2); + + return 0; +} + +static const struct dm_gpio_ops xilinx_gpio_ops = { + .direction_input = xilinx_gpio_direction_input, + .direction_output = xilinx_gpio_direction_output, + .get_value = xilinx_gpio_get_value, + .set_value = xilinx_gpio_set_value, + .get_function = xilinx_gpio_get_function, +}; + +static int xilinx_gpio_probe(struct udevice *dev) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + uc_priv->bank_name = dev->name; + + uc_priv->gpio_count = platdata->bank_max[0] + platdata->bank_max[1]; + + return 0; +} + +static int xilinx_gpio_ofdata_to_platdata(struct udevice *dev) +{ + struct xilinx_gpio_platdata *platdata = dev_get_platdata(dev); + int is_dual; + + platdata->regs = (struct gpio_regs *)dev_read_addr(dev); + + platdata->bank_max[0] = dev_read_u32_default(dev, + "xlnx,gpio-width", 0); + platdata->bank_input[0] = dev_read_u32_default(dev, + "xlnx,all-inputs", 0); + platdata->bank_output[0] = dev_read_u32_default(dev, + "xlnx,all-outputs", 0); + + is_dual = dev_read_u32_default(dev, "xlnx,is-dual", 0); + if (is_dual) { + platdata->bank_max[1] = dev_read_u32_default(dev, + "xlnx,gpio2-width", 0); + platdata->bank_input[1] = dev_read_u32_default(dev, + "xlnx,all-inputs-2", 0); + platdata->bank_output[1] = dev_read_u32_default(dev, + "xlnx,all-outputs-2", 0); + } + + return 0; +} + +static const struct udevice_id xilinx_gpio_ids[] = { + { .compatible = "xlnx,xps-gpio-1.00.a",}, + { } +}; + +U_BOOT_DRIVER(xilinx_gpio) = { + .name = "xlnx_gpio", + .id = UCLASS_GPIO, + .ops = &xilinx_gpio_ops, + .of_match = xilinx_gpio_ids, + .ofdata_to_platdata = xilinx_gpio_ofdata_to_platdata, + .probe = xilinx_gpio_probe, + .platdata_auto_alloc_size = sizeof(struct xilinx_gpio_platdata), +}; +#endif