From patchwork Sun Aug 26 11:52:06 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Abraham X-Patchwork-Id: 1374811 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id D08E6DFABE for ; Sun, 26 Aug 2012 11:34:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754080Ab2HZLea (ORCPT ); Sun, 26 Aug 2012 07:34:30 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:33067 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753954Ab2HZLe3 (ORCPT ); Sun, 26 Aug 2012 07:34:29 -0400 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0M9D006XB1GZK000@mailout1.samsung.com>; Sun, 26 Aug 2012 20:34:28 +0900 (KST) X-AuditID: cbfee61a-b7fc66d0000043b7-5d-503a09c442e4 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id CF.4A.17335.4C90A305; Sun, 26 Aug 2012 20:34:28 +0900 (KST) Received: from localhost.localdomain ([107.108.73.37]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0M9D00AQQ1GN7UA0@mmp1.samsung.com>; Sun, 26 Aug 2012 20:34:28 +0900 (KST) From: Thomas Abraham To: linux-mmc@vger.kernel.org, devicetree-discuss@lists.ozlabs.org Cc: cjb@laptop.org, grant.likely@secretlab.ca, rob.herring@calxeda.com, linux-samsung-soc@vger.kernel.org, kgene.kim@samsung.com, girish.shivananjappa@linaro.org, jh80.chung@samsung.com, tgih.jun@samsung.com, patches@linaro.org Subject: [PATCH v4 8/9] mmc: dw_mmc: add support for implementation specific callbacks Date: Sun, 26 Aug 2012 17:22:06 +0530 Message-id: <1345981927-26359-9-git-send-email-thomas.abraham@linaro.org> X-Mailer: git-send-email 1.6.6.rc2 In-reply-to: <1345981927-26359-1-git-send-email-thomas.abraham@linaro.org> References: <1345981927-26359-1-git-send-email-thomas.abraham@linaro.org> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrKJMWRmVeSWpSXmKPExsVy+t9jAd0jnFYBBp23dS2O/O9ntJhxfh+T A5PH501yAYxRXDYpqTmZZalF+nYJXBmH/6gVzLOr2PR6LWsD4z7jLkZODgkBE4nZqyezQNhi EhfurWfrYuTiEBJYxCjxauIRdginjUli7a/7YFVsAgYSjxa+YwexRQScJJbMncAMUsQs8JJR YuaumWwgCWGBCImjzxqBGjg4WARUJU50hIGYvAKeEue38kMsU5LY0HuUCcTmFPCSuLGoFWyk EFDJ8RnfGScw8i5gZFjFKJpakFxQnJSea6hXnJhbXJqXrpecn7uJEez5Z1I7GFc2WBxiFOBg VOLhFSi1DBBiTSwrrsw9xCjBwawkwvt9P1CINyWxsiq1KD++qDQntfgQozQHi5I4L3+fYYCQ QHpiSWp2ampBahFMlomDU6qB0aPp2ce//Wphqy6bp6y486NrVUXqmeSlDIuaOupEF3/oidYR lXA8KS21VWKR9Xx3jrW5eyz4DLqvHztcw+vJpxLOmRrM9ELwluy68tYr0+I73T5/ZarXstw/ t+lfU8rUa4/89V6e+GzNOb/1/H5f2byNfX7agldUVgcFbbjw1Nnj7SHRXVuXK7EUZyQaajEX FScCAO3M6LH4AQAA Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org The core dw-mshc controller driver can let platform specific implementations of the dw-mshc controller to control the hardware as required by such implementations. This is acheived by invoking implementation specific (optional) callbacks. Define the list of callbacks supported the add invocation points for the same. Signed-off-by: Thomas Abraham --- drivers/mmc/host/dw_mmc-pltfm.c | 12 ++++++++++-- drivers/mmc/host/dw_mmc-pltfm.h | 3 ++- drivers/mmc/host/dw_mmc.c | 36 +++++++++++++++++++++++++++++++++++- drivers/mmc/host/dw_mmc.h | 22 ++++++++++++++++++++++ include/linux/mmc/dw_mmc.h | 4 ++++ 5 files changed, 73 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c index 57df3eb..1b3e6b3 100644 --- a/drivers/mmc/host/dw_mmc-pltfm.c +++ b/drivers/mmc/host/dw_mmc-pltfm.c @@ -23,7 +23,8 @@ #include "dw_mmc.h" -int dw_mci_pltfm_register(struct platform_device *pdev) +int dw_mci_pltfm_register(struct platform_device *pdev, + struct dw_mci_drv_data *drv_data) { struct dw_mci *host; struct resource *regs; @@ -41,6 +42,7 @@ int dw_mci_pltfm_register(struct platform_device *pdev) if (host->irq < 0) return host->irq; + host->drv_data = drv_data; host->dev = &pdev->dev; host->irq_flags = 0; host->pdata = pdev->dev.platform_data; @@ -48,6 +50,12 @@ int dw_mci_pltfm_register(struct platform_device *pdev) if (!host->regs) return -ENOMEM; + if (host->drv_data->init) { + ret = host->drv_data->init(host); + if (ret) + return ret; + } + platform_set_drvdata(pdev, host); ret = dw_mci_probe(host); return ret; @@ -56,7 +64,7 @@ EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); static int dw_mci_pltfm_probe(struct platform_device *pdev) { - return dw_mci_pltfm_register(pdev); + return dw_mci_pltfm_register(pdev, NULL); } int __exit dw_mci_pltfm_remove(struct platform_device *pdev) diff --git a/drivers/mmc/host/dw_mmc-pltfm.h b/drivers/mmc/host/dw_mmc-pltfm.h index 5618608..f226c21 100644 --- a/drivers/mmc/host/dw_mmc-pltfm.h +++ b/drivers/mmc/host/dw_mmc-pltfm.h @@ -12,7 +12,8 @@ #ifndef _DW_MMC_PLTFM_H_ #define _DW_MMC_PLTFM_H_ -extern int dw_mci_pltfm_register(struct platform_device *pdev); +extern int dw_mci_pltfm_register(struct platform_device *pdev, + struct dw_mci_drv_data *drv_data); extern int __exit dw_mci_pltfm_remove(struct platform_device *pdev); extern const struct dev_pm_ops dw_mci_pltfm_pmops; diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index b8ec067..bd51050 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -231,6 +231,7 @@ static void dw_mci_set_timeout(struct dw_mci *host) static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) { struct mmc_data *data; + struct dw_mci_slot *slot = mmc_priv(mmc); u32 cmdr; cmd->error = -EINPROGRESS; @@ -260,6 +261,9 @@ static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) cmdr |= SDMMC_CMD_DAT_WR; } + if (slot->host->drv_data->prepare_command) + slot->host->drv_data->prepare_command(slot->host, &cmdr); + return cmdr; } @@ -812,6 +816,9 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) slot->clock = ios->clock; } + if (slot->host->drv_data->set_ios) + slot->host->drv_data->set_ios(slot->host, ios); + switch (ios->power_mode) { case MMC_POWER_UP: set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); @@ -1813,6 +1820,7 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) { struct mmc_host *mmc; struct dw_mci_slot *slot; + int ctrl_id, ret; u8 bus_width; mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); @@ -1844,6 +1852,14 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) if (host->pdata->caps) mmc->caps = host->pdata->caps; + if (host->dev->of_node) { + ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); + if (ctrl_id < 0) + ctrl_id = 0; + } + if (host->drv_data && host->drv_data->caps) + mmc->caps |= host->drv_data->caps[ctrl_id]; + if (host->pdata->caps2) mmc->caps2 = host->pdata->caps2; @@ -1854,6 +1870,14 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) else bus_width = 1; + if (host->drv_data->setup_bus) { + struct device_node *slot_np; + slot_np = dw_mci_of_find_slot_node(host->dev, slot->id); + ret = host->drv_data->setup_bus(host, slot_np, bus_width); + if (ret) + goto err_setup_bus; + } + switch (bus_width) { case 8: mmc->caps |= MMC_CAP_8_BIT_DATA; @@ -1920,6 +1944,10 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) queue_work(host->card_workqueue, &host->card_work); return 0; + +err_setup_bus: + mmc_free_host(mmc); + return -EINVAL; } static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) @@ -2014,7 +2042,7 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) struct dw_mci_board *pdata; struct device *dev = host->dev; struct device_node *np = dev->of_node; - int idx; + int idx, ret; pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { @@ -2041,6 +2069,12 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); + if (host->drv_data->parse_dt) { + ret = host->drv_data->parse_dt(host); + if (ret) + return ERR_PTR(ret); + } + return pdata; } diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index 15c27e1..a9f045a 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -182,4 +182,26 @@ extern int dw_mci_suspend(struct dw_mci *host); extern int dw_mci_resume(struct dw_mci *host); #endif +/** + * dw_mci driver data - dw-mshc implementation specific driver data. + * @caps: mmc subsystem specified capabilities of the controller(s). + * @init: early implementation specific initialization. + * @prepare_command: handle CMD register extensions. + * @set_ios: handle bus specific extensions. + * @parse_dt: parse implementation specific device tree properties. + * @setup_bus: initialize io-interface + * + * Provide controller implementation specific extensions. The usage of this + * data structure is fully optional and usage of each member in this structure + * is optional as well. + */ +struct dw_mci_drv_data { + unsigned long *caps; + int (*init)(struct dw_mci *host); + void (*prepare_command)(struct dw_mci *host, u32 *cmdr); + void (*set_ios)(struct dw_mci *host, struct mmc_ios *ios); + int (*parse_dt)(struct dw_mci *host); + int (*setup_bus)(struct dw_mci *host, + struct device_node *slot_np, u8 bus_width); +}; #endif /* _DW_MMC_H_ */ diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h index b72e4aa..6cb043e 100644 --- a/include/linux/mmc/dw_mmc.h +++ b/include/linux/mmc/dw_mmc.h @@ -78,6 +78,8 @@ struct mmc_data; * @data_offset: Set the offset of DATA register according to VERID. * @dev: Device associated with the MMC controller. * @pdata: Platform data associated with the MMC controller. + * @drv_data: Driver specific data for identified variant of the controller + * @priv: Implementation defined private data. * @biu_clk: Pointer to bus interface unit clock instance. * @ciu_clk: Pointer to card interface unit clock instance. * @slot: Slots sharing this MMC controller. @@ -160,6 +162,8 @@ struct dw_mci { u16 data_offset; struct device *dev; struct dw_mci_board *pdata; + struct dw_mci_drv_data *drv_data; + void *priv; struct clk *biu_clk; struct clk *ciu_clk; struct dw_mci_slot *slot[MAX_MCI_SLOTS];