From patchwork Mon Sep 22 15:48:49 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 392047 X-Patchwork-Delegate: sjg@chromium.org Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 6EFD214017D for ; Tue, 23 Sep 2014 01:55:05 +1000 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 56CEAA75B4; Mon, 22 Sep 2014 17:54:55 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BpvNEHHdsMjp; Mon, 22 Sep 2014 17:54:55 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 35F44B37B5; Mon, 22 Sep 2014 17:53:43 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 95CA0B379E for ; Mon, 22 Sep 2014 17:53:32 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id tzTTn5d+GVql for ; Mon, 22 Sep 2014 17:53:29 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from mail-pd0-f202.google.com (mail-pd0-f202.google.com [209.85.192.202]) by theia.denx.de (Postfix) with ESMTPS id 2AC28A74A0 for ; Mon, 22 Sep 2014 17:53:14 +0200 (CEST) Received: by mail-pd0-f202.google.com with SMTP id r10so143045pdi.5 for ; Mon, 22 Sep 2014 08:53:13 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=S5bJZq6MYdjQiXu48ulvd6GbsZIRSe7zO12Rd4Q1HRs=; b=l4uY2UmEygna3jfdKYLJarOR7JCAUPQXSpmV/IfQVOJMgnJmLDStSC/G6+yxF/RvfB gLuTwMhRdWvptPnzFaii1BerD+uagZgCSPKSdNZ66U3sge8CVzJm138G9WLAfFrDj86I sNqbD8afx/Y14AO3sFyYstxEg1UB1kQrLRhox1IS+Bij3Bxq6q09b+gZeuj2FacZD2K+ IR1XuWAkjQ6yR5Hx0zs8kzjt3FAkrVKYCh29waZUSCKPiPrRNLrmcar+Zsub5cAlqPio rZD0EqZ/epoVXtLsZUiUwlNdlrZNML9srnCfLzPB+eNVklltbHTcoH8IuucXIwC8m82Q jLJg== X-Gm-Message-State: ALoCoQllgXbiF9EC84IzR4ki8yV1s0gNfZDMJwZmORRHdzPGwo/8VOsVjwmZJMKwnOB0SwBe0vt2 X-Received: by 10.66.156.232 with SMTP id wh8mr24471088pab.27.1411401193089; Mon, 22 Sep 2014 08:53:13 -0700 (PDT) Received: from corpmail-nozzle1-2.hot.corp.google.com ([100.108.1.103]) by gmr-mx.google.com with ESMTPS id n22si501395yhd.1.2014.09.22.08.53.12 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 Sep 2014 08:53:13 -0700 (PDT) Received: from kaki.bld.corp.google.com ([172.29.216.32]) by corpmail-nozzle1-2.hot.corp.google.com with ESMTP id Fjok975r.1; Mon, 22 Sep 2014 08:53:12 -0700 Received: by kaki.bld.corp.google.com (Postfix, from userid 121222) id E79C2223A80; Mon, 22 Sep 2014 09:53:11 -0600 (MDT) From: Simon Glass To: U-Boot Mailing List Date: Mon, 22 Sep 2014 09:48:49 -0600 Message-Id: <1411400934-7754-10-git-send-email-sjg@chromium.org> X-Mailer: git-send-email 2.1.0.rc2.206.gedb03e5 In-Reply-To: <1411400934-7754-1-git-send-email-sjg@chromium.org> References: <1411400934-7754-1-git-send-email-sjg@chromium.org> MIME-Version: 1.0 Cc: Tom Rini Subject: [U-Boot] [PATCH 09/14] dm: omap: gpio: Support driver model X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.11 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de Add driver model support to this driver, while retaining support for the legacy system. Driver model GPIO support is enabled with CONFIG_DM_GPIO as usual. Since gpio_is_valid() no longer exists, we can use the -EINVAL error returned from gpio_request(). Signed-off-by: Simon Glass Reviewed-by: Tom Rini --- arch/arm/include/asm/omap_gpio.h | 19 +++- drivers/gpio/omap_gpio.c | 221 +++++++++++++++++++++++++++++++++++++++ drivers/mmc/omap_hsmmc.c | 15 ++- 3 files changed, 248 insertions(+), 7 deletions(-) diff --git a/arch/arm/include/asm/omap_gpio.h b/arch/arm/include/asm/omap_gpio.h index 5d25d04..839af54 100644 --- a/arch/arm/include/asm/omap_gpio.h +++ b/arch/arm/include/asm/omap_gpio.h @@ -23,6 +23,21 @@ #include +enum gpio_method { + METHOD_GPIO_24XX = 4, +}; + +#ifdef CONFIG_DM_GPIO + +/* Information about a GPIO bank */ +struct omap_gpio_platdata { + int bank_index; + ulong base; /* address of registers in physical memory */ + enum gpio_method method; +}; + +#else + struct gpio_bank { void *base; int method; @@ -30,8 +45,6 @@ struct gpio_bank { extern const struct gpio_bank *const omap_gpio_bank; -#define METHOD_GPIO_24XX 4 - /** * Check if gpio is valid. * @@ -39,4 +52,6 @@ extern const struct gpio_bank *const omap_gpio_bank; * @return 1 if ok, 0 on error */ int gpio_is_valid(int gpio); +#endif + #endif /* _GPIO_H_ */ diff --git a/drivers/gpio/omap_gpio.c b/drivers/gpio/omap_gpio.c index d2d2640..a4651bc 100644 --- a/drivers/gpio/omap_gpio.c +++ b/drivers/gpio/omap_gpio.c @@ -19,6 +19,7 @@ * Written by Juha Yrjölä */ #include +#include #include #include #include @@ -26,6 +27,20 @@ #define OMAP_GPIO_DIR_OUT 0 #define OMAP_GPIO_DIR_IN 1 +#ifdef CONFIG_DM_GPIO + +#define GPIO_NAME_SIZE 20 +#define GPIO_PER_BANK 32 + +struct gpio_bank { + char label[GPIO_PER_BANK][GPIO_NAME_SIZE]; + /* TODO(sjg@chromium.org): Can we use a struct here? */ + void *base; /* address of registers in physical memory */ + enum gpio_method method; +}; + +#endif + static inline int get_gpio_index(int gpio) { return gpio & 0x1f; @@ -130,6 +145,8 @@ static int _get_gpio_value(const struct gpio_bank *bank, int gpio) return (__raw_readl(reg) & (1 << gpio)) != 0; } +#ifndef CONFIG_DM_GPIO + static inline const struct gpio_bank *get_gpio_bank(int gpio) { return &omap_gpio_bank[gpio >> 5]; @@ -226,3 +243,207 @@ int gpio_free(unsigned gpio) { return 0; } + +#else /* new driver model interface CONFIG_DM_GPIO */ + +/** + * gpio_is_requested() - check if a GPIO has been requested + * + * @bank: Bank to check + * @offset: GPIO offset within bank to check + * @return true if marked as requested, false if not + */ +static inline bool gpio_is_requested(struct gpio_bank *bank, int offset) +{ + return *bank->label[offset] != '\0'; +} + +static int omap_gpio_is_output(struct gpio_bank *bank, int offset) +{ + return _get_gpio_direction(bank, offset) == OMAP_GPIO_DIR_OUT; +} + +static int check_requested(struct udevice *dev, unsigned offset, + const char *func) +{ + struct gpio_bank *bank = dev_get_priv(dev); + struct gpio_dev_priv *uc_priv = dev->uclass_priv; + + if (!gpio_is_requested(bank, offset)) { + printf("omap_gpio: %s: error: gpio %s%d not requested\n", + func, uc_priv->bank_name, offset); + return -EPERM; + } + + return 0; +} + +/* set GPIO pin 'gpio' as an input */ +static int omap_gpio_direction_input(struct udevice *dev, unsigned offset) +{ + struct gpio_bank *bank = dev_get_priv(dev); + int ret; + + ret = check_requested(dev, offset, __func__); + if (ret) + return ret; + + /* Configure GPIO direction as input. */ + _set_gpio_direction(bank, offset, 1); + + return 0; +} + +/* set GPIO pin 'gpio' as an output, with polarity 'value' */ +static int omap_gpio_direction_output(struct udevice *dev, unsigned offset, + int value) +{ + struct gpio_bank *bank = dev_get_priv(dev); + int ret; + + ret = check_requested(dev, offset, __func__); + if (ret) + return ret; + + _set_gpio_dataout(bank, offset, value); + _set_gpio_direction(bank, offset, 0); + + return 0; +} + +/* read GPIO IN value of pin 'gpio' */ +static int omap_gpio_get_value(struct udevice *dev, unsigned offset) +{ + struct gpio_bank *bank = dev_get_priv(dev); + int ret; + + ret = check_requested(dev, offset, __func__); + if (ret) + return ret; + + return _get_gpio_value(bank, offset); +} + +/* write GPIO OUT value to pin 'gpio' */ +static int omap_gpio_set_value(struct udevice *dev, unsigned offset, + int value) +{ + struct gpio_bank *bank = dev_get_priv(dev); + int ret; + + ret = check_requested(dev, offset, __func__); + if (ret) + return ret; + + _set_gpio_dataout(bank, offset, value); + + return 0; +} + +static int omap_gpio_get_state(struct udevice *dev, unsigned int offset, + char *buf, int bufsize) +{ + struct gpio_dev_priv *uc_priv = dev->uclass_priv; + struct gpio_bank *bank = dev_get_priv(dev); + const char *label; + bool requested; + bool is_output; + int size; + + label = bank->label[offset]; + is_output = omap_gpio_is_output(bank->base, offset); + size = snprintf(buf, bufsize, "%s%d: ", + uc_priv->bank_name ? uc_priv->bank_name : "", offset); + buf += size; + bufsize -= size; + requested = gpio_is_requested(bank, offset); + snprintf(buf, bufsize, "%s: %d [%c]%s%s", + is_output ? "out" : " in", + _get_gpio_value(bank, offset), + requested ? 'x' : ' ', + requested ? " " : "", + label); + + return 0; +} + +static int omap_gpio_request(struct udevice *dev, unsigned offset, + const char *label) +{ + struct gpio_bank *bank = dev_get_priv(dev); + + if (gpio_is_requested(bank, offset)) + return -EBUSY; + + strncpy(bank->label[offset], label, GPIO_NAME_SIZE); + bank->label[offset][GPIO_NAME_SIZE - 1] = '\0'; + + return 0; +} + +static int omap_gpio_free(struct udevice *dev, unsigned offset) +{ + struct gpio_bank *bank = dev_get_priv(dev); + int ret; + + ret = check_requested(dev, offset, __func__); + if (ret) + return ret; + bank->label[offset][0] = '\0'; + + return 0; +} + +static int omap_gpio_get_function(struct udevice *dev, unsigned offset) +{ + struct gpio_bank *bank = dev_get_priv(dev); + + if (!gpio_is_requested(bank, offset)) + return GPIOF_UNUSED; + + /* GPIOF_FUNC is not implemented yet */ + if (_get_gpio_direction(bank->base, offset)) + return GPIOF_OUTPUT; + else + return GPIOF_INPUT; +} + +static const struct dm_gpio_ops gpio_omap_ops = { + .request = omap_gpio_request, + .free = omap_gpio_free, + .direction_input = omap_gpio_direction_input, + .direction_output = omap_gpio_direction_output, + .get_value = omap_gpio_get_value, + .set_value = omap_gpio_set_value, + .get_function = omap_gpio_get_function, + .get_state = omap_gpio_get_state, +}; + +static int omap_gpio_probe(struct udevice *dev) +{ + struct gpio_bank *bank = dev_get_priv(dev); + struct omap_gpio_platdata *plat = dev_get_platdata(dev); + struct gpio_dev_priv *uc_priv = dev->uclass_priv; + char name[18], *str; + + sprintf(name, "GPIO%d_", plat->bank_index); + str = strdup(name); + if (!str) + return -ENOMEM; + uc_priv->bank_name = str; + uc_priv->gpio_count = GPIO_PER_BANK; + bank->base = (void *)plat->base; + bank->method = plat->method; + + return 0; +} + +U_BOOT_DRIVER(gpio_omap) = { + .name = "gpio_omap", + .id = UCLASS_GPIO, + .ops = &gpio_omap_ops, + .probe = omap_gpio_probe, + .priv_auto_alloc_size = sizeof(struct gpio_bank), +}; + +#endif /* CONFIG_DM_GPIO */ diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c index 5b0c302..ef2cbf9 100644 --- a/drivers/mmc/omap_hsmmc.c +++ b/drivers/mmc/omap_hsmmc.c @@ -67,14 +67,19 @@ static int mmc_write_data(struct hsmmc *mmc_base, const char *buf, #ifdef OMAP_HSMMC_USE_GPIO static int omap_mmc_setup_gpio_in(int gpio, const char *label) { - if (!gpio_is_valid(gpio)) - return -1; + int ret; - if (gpio_request(gpio, label) < 0) +#ifndef CONFIG_DM_GPIO + if (!gpio_is_valid(gpio)) return -1; +#endif + ret = gpio_request(gpio, label); + if (ret) + return ret; - if (gpio_direction_input(gpio) < 0) - return -1; + ret = gpio_direction_input(gpio); + if (ret) + return ret; return gpio; }