Adds a new driver _ocp2scp_. This driver takes the responsibility of creating all the devices that is connected to OCP2SCP. In the case of OMAP4, USB2PHY is connected to ocp2scp.
Signed-off-by: Kishon Vijay Abraham I <[email protected]> --- drivers/misc/Kconfig | 8 ++ drivers/misc/Makefile | 1 + drivers/misc/omap-ocp2scp.c | 135 ++++++++++++++++++++++++++++ include/linux/platform_data/omap_ocp2scp.h | 31 +++++++ 4 files changed, 175 insertions(+), 0 deletions(-) create mode 100644 drivers/misc/omap-ocp2scp.c create mode 100644 include/linux/platform_data/omap_ocp2scp.h diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 2661f6e..c70aa15 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -508,6 +508,14 @@ config USB_SWITCH_FSA9480 stereo and mono audio, video, microphone and UART data to use a common connector port. +config OMAP_OCP2SCP + tristate "OMAP OCP2SCP DRIVER" + help + Driver to enable ocp2scp module which transforms ocp interface + protocol to scp protocol. In OMAP4, USB PHY is connected via + OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via + OCP2SCP. + source "drivers/misc/c2port/Kconfig" source "drivers/misc/eeprom/Kconfig" source "drivers/misc/cb710/Kconfig" diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index 456972f..4d7c8ce 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -50,4 +50,5 @@ obj-y += lis3lv02d/ obj-y += carma/ obj-$(CONFIG_USB_SWITCH_FSA9480) += fsa9480.o obj-$(CONFIG_ALTERA_STAPL) +=altera-stapl/ +obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o obj-$(CONFIG_INTEL_MEI) += mei/ diff --git a/drivers/misc/omap-ocp2scp.c b/drivers/misc/omap-ocp2scp.c new file mode 100644 index 0000000..c53b9f4 --- /dev/null +++ b/drivers/misc/omap-ocp2scp.c @@ -0,0 +1,135 @@ +/* + * omap-ocp2scp.c - transform ocp interface protocol to scp protocol + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I <[email protected]> + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/pm_runtime.h> +#include <linux/platform_data/omap_ocp2scp.h> + +/** + * _count_resources - count for the number of resources + * @res: struct resource * + * + * Count and return the number of resources populated for the device that is + * connected to ocp2scp. + */ +static unsigned _count_resources(struct resource *res) +{ + int cnt = 0; + + while (res->start != res->end) { + cnt++; + res++; + } + + return cnt; +} + +static int ocp2scp_remove_devices(struct device *dev, void *c) +{ + struct platform_device *pdev = to_platform_device(dev); + + platform_device_unregister(pdev); + + return 0; +} + +static int __devinit omap_ocp2scp_probe(struct platform_device *pdev) +{ + int ret; + unsigned res_cnt, i; + struct platform_device *pdev_child; + struct omap_ocp2scp_platform_data *pdata; + struct omap_ocp2scp_dev *dev; + + pdata = pdev->dev.platform_data; + if (!pdata) { + dev_err(&pdev->dev, "OCP2SCP initialized without plat data\n"); + return -EINVAL; + } + + for (i = 0, dev = *pdata->devices; i < pdata->dev_cnt; i++, dev++) { + res_cnt = _count_resources(dev->res); + + pdev_child = platform_device_alloc(dev->drv_name, -1); + if (!pdev_child) { + dev_err(&pdev->dev, "failed to allocate memory for ocp2scp child\n"); + return -ENOMEM; + } + + ret = platform_device_add_resources(pdev_child, dev->res, + res_cnt); + if (ret) { + dev_err(&pdev->dev, "failed to add resources for ocp2scp child\n"); + goto err0; + } + + pdev_child->dev.parent = &pdev->dev; + + ret = platform_device_add(pdev_child); + if (ret) { + dev_err(&pdev->dev, "failed to register ocp2scp child device\n"); + goto err0; + } + } + + pm_runtime_enable(&pdev->dev); + + return 0; + +err0: + platform_device_put(pdev_child); + device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); + + return ret; +} + +static int __devexit omap_ocp2scp_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices); + + return 0; +} + +static struct platform_driver omap_ocp2scp_driver = { + .probe = omap_ocp2scp_probe, + .remove = __devexit_p(omap_ocp2scp_remove), + .driver = { + .name = "omap-ocp2scp", + .owner = THIS_MODULE, + }, +}; + +static int __init omap_ocp2scp_init(void) +{ + return platform_driver_register(&omap_ocp2scp_driver); +} +arch_initcall(omap_ocp2scp_init); + +static void __exit omap_ocp2scp_exit(void) +{ + platform_driver_unregister(&omap_ocp2scp_driver); +} +module_exit(omap_ocp2scp_exit); + +MODULE_ALIAS("platform: omap-ocp2scp"); +MODULE_AUTHOR("Kishon Vijay Abraham I <[email protected]>"); +MODULE_DESCRIPTION("OMAP OCP2SCP DRIVER"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/platform_data/omap_ocp2scp.h b/include/linux/platform_data/omap_ocp2scp.h new file mode 100644 index 0000000..dcbbf2a --- /dev/null +++ b/include/linux/platform_data/omap_ocp2scp.h @@ -0,0 +1,31 @@ +/* + * omap_ocp2scp.h -- ocp2scp header file + * + * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I <[email protected]> + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#ifndef __DRIVERS_OMAP_OCP2SCP_H +#define __DRIVERS_OMAP_OCP2SCP_H + +struct omap_ocp2scp_dev { + const char *drv_name; + struct resource *res; +}; + +struct omap_ocp2scp_platform_data { + int dev_cnt; + struct omap_ocp2scp_dev **devices; +}; +#endif /* __DRIVERS_OMAP_OCP2SCP_H */ -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
