diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mcb/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/mcb/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mcb/mcb-lpc.c | 158 |
3 files changed, 168 insertions, 0 deletions
diff --git a/drivers/mcb/Kconfig b/drivers/mcb/Kconfig index e9a6976e1010..76d9c51de6c9 100644 --- a/drivers/mcb/Kconfig +++ b/drivers/mcb/Kconfig @@ -28,4 +28,13 @@ config MCB_PCI If build as a module, the module is called mcb-pci.ko +config MCB_LPC + tristate "LPC (non PCI) based MCB carrier" + default n + help + + This is a MCB carrier on a LPC or non PCI device. + + If build as a module, the module is called mcb-lpc.ko + endif # MCB diff --git a/drivers/mcb/Makefile b/drivers/mcb/Makefile index 1ae141311def..bcc7745774ab 100644 --- a/drivers/mcb/Makefile +++ b/drivers/mcb/Makefile @@ -5,3 +5,4 @@ mcb-y += mcb-core.o mcb-y += mcb-parse.o obj-$(CONFIG_MCB_PCI) += mcb-pci.o +obj-$(CONFIG_MCB_LPC) += mcb-lpc.o diff --git a/drivers/mcb/mcb-lpc.c b/drivers/mcb/mcb-lpc.c new file mode 100644 index 000000000000..d072c088ce73 --- /dev/null +++ b/drivers/mcb/mcb-lpc.c @@ -0,0 +1,158 @@ +/* + * MEN Chameleon Bus. + * + * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) + * Author: Andreas Werner <andreas.werner@men.de> + * + * 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; version 2 of the License. + */ + +#include <linux/platform_device.h> +#include <linux/module.h> +#include <linux/dmi.h> +#include <linux/mcb.h> +#include <linux/io.h> +#include "mcb-internal.h" + +struct priv { + struct mcb_bus *bus; + struct resource *mem; + void __iomem *base; +}; + +static int mcb_lpc_probe(struct platform_device *pdev) +{ + struct resource *res; + struct priv *priv; + int ret = 0; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!priv->mem) { + dev_err(&pdev->dev, "No Memory resource\n"); + return -ENODEV; + } + + res = devm_request_mem_region(&pdev->dev, priv->mem->start, + resource_size(priv->mem), + KBUILD_MODNAME); + if (!res) { + dev_err(&pdev->dev, "Failed to request IO memory\n"); + return -EBUSY; + } + + priv->base = devm_ioremap(&pdev->dev, priv->mem->start, + resource_size(priv->mem)); + if (!priv->base) { + dev_err(&pdev->dev, "Cannot ioremap\n"); + return -ENOMEM; + } + + platform_set_drvdata(pdev, priv); + + priv->bus = mcb_alloc_bus(&pdev->dev); + if (IS_ERR(priv->bus)) + return PTR_ERR(priv->bus); + + ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base); + if (ret < 0) { + mcb_release_bus(priv->bus); + return ret; + } + + dev_dbg(&pdev->dev, "Found %d cells\n", ret); + + mcb_bus_add_devices(priv->bus); + + return 0; + +} + +static int mcb_lpc_remove(struct platform_device *pdev) +{ + struct priv *priv = platform_get_drvdata(pdev); + + mcb_release_bus(priv->bus); + + return 0; +} + +static struct platform_device *mcb_lpc_pdev; + +static int mcb_lpc_create_platform_device(const struct dmi_system_id *id) +{ + struct resource *res = id->driver_data; + int ret; + + mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1); + if (!mcb_lpc_pdev) + return -ENOMEM; + + ret = platform_device_add_resources(mcb_lpc_pdev, res, 1); + if (ret) + goto out_put; + + ret = platform_device_add(mcb_lpc_pdev); + if (ret) + goto out_put; + + return 0; + +out_put: + platform_device_put(mcb_lpc_pdev); + return ret; +} + +static struct resource sc24_fpga_resource = { + .start = 0xe000e000, + .end = 0xe000e000 + CHAM_HEADER_SIZE, + .flags = IORESOURCE_MEM, +}; + +static struct platform_driver mcb_lpc_driver = { + .driver = { + .name = "mcb-lpc", + }, + .probe = mcb_lpc_probe, + .remove = mcb_lpc_remove, +}; + +static const struct dmi_system_id mcb_lpc_dmi_table[] = { + { + .ident = "SC24", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "MEN"), + DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"), + }, + .driver_data = (void *)&sc24_fpga_resource, + .callback = mcb_lpc_create_platform_device, + }, + {} +}; +MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table); + +static int __init mcb_lpc_init(void) +{ + if (!dmi_check_system(mcb_lpc_dmi_table)) + return -ENODEV; + + return platform_driver_register(&mcb_lpc_driver); +} + +static void __exit mcb_lpc_exit(void) +{ + platform_device_unregister(mcb_lpc_pdev); + platform_driver_unregister(&mcb_lpc_driver); +} + +module_init(mcb_lpc_init); +module_exit(mcb_lpc_exit); + +MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MCB over LPC support"); |