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162 lines
3.5 KiB
162 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* MEN Chameleon Bus. |
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* |
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* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) |
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* Author: Andreas Werner <[email protected]> |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/module.h> |
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#include <linux/dmi.h> |
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#include <linux/mcb.h> |
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#include <linux/io.h> |
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#include "mcb-internal.h" |
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struct priv { |
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struct mcb_bus *bus; |
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struct resource *mem; |
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void __iomem *base; |
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}; |
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static int mcb_lpc_probe(struct platform_device *pdev) |
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{ |
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struct resource *res; |
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struct priv *priv; |
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int ret = 0; |
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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if (!priv->mem) { |
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dev_err(&pdev->dev, "No Memory resource\n"); |
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return -ENODEV; |
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} |
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res = devm_request_mem_region(&pdev->dev, priv->mem->start, |
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resource_size(priv->mem), |
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KBUILD_MODNAME); |
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if (!res) { |
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dev_err(&pdev->dev, "Failed to request IO memory\n"); |
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return -EBUSY; |
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} |
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priv->base = devm_ioremap(&pdev->dev, priv->mem->start, |
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resource_size(priv->mem)); |
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if (!priv->base) { |
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dev_err(&pdev->dev, "Cannot ioremap\n"); |
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return -ENOMEM; |
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} |
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platform_set_drvdata(pdev, priv); |
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priv->bus = mcb_alloc_bus(&pdev->dev); |
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if (IS_ERR(priv->bus)) |
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return PTR_ERR(priv->bus); |
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ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base); |
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if (ret < 0) { |
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mcb_release_bus(priv->bus); |
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return ret; |
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} |
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dev_dbg(&pdev->dev, "Found %d cells\n", ret); |
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mcb_bus_add_devices(priv->bus); |
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return 0; |
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} |
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static int mcb_lpc_remove(struct platform_device *pdev) |
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{ |
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struct priv *priv = platform_get_drvdata(pdev); |
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mcb_release_bus(priv->bus); |
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return 0; |
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} |
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static struct platform_device *mcb_lpc_pdev; |
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static int mcb_lpc_create_platform_device(const struct dmi_system_id *id) |
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{ |
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struct resource *res = id->driver_data; |
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int ret; |
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mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1); |
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if (!mcb_lpc_pdev) |
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return -ENOMEM; |
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ret = platform_device_add_resources(mcb_lpc_pdev, res, 1); |
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if (ret) |
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goto out_put; |
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ret = platform_device_add(mcb_lpc_pdev); |
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if (ret) |
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goto out_put; |
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return 0; |
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out_put: |
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platform_device_put(mcb_lpc_pdev); |
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return ret; |
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} |
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static struct resource sc24_fpga_resource = DEFINE_RES_MEM(0xe000e000, CHAM_HEADER_SIZE); |
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static struct resource sc31_fpga_resource = DEFINE_RES_MEM(0xf000e000, CHAM_HEADER_SIZE); |
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static struct platform_driver mcb_lpc_driver = { |
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.driver = { |
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.name = "mcb-lpc", |
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}, |
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.probe = mcb_lpc_probe, |
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.remove = mcb_lpc_remove, |
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}; |
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static const struct dmi_system_id mcb_lpc_dmi_table[] = { |
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{ |
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.ident = "SC24", |
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.matches = { |
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DMI_MATCH(DMI_SYS_VENDOR, "MEN"), |
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DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"), |
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}, |
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.driver_data = (void *)&sc24_fpga_resource, |
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.callback = mcb_lpc_create_platform_device, |
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}, |
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{ |
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.ident = "SC31", |
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.matches = { |
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DMI_MATCH(DMI_SYS_VENDOR, "MEN"), |
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DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"), |
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}, |
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.driver_data = (void *)&sc31_fpga_resource, |
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.callback = mcb_lpc_create_platform_device, |
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}, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table); |
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static int __init mcb_lpc_init(void) |
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{ |
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if (!dmi_check_system(mcb_lpc_dmi_table)) |
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return -ENODEV; |
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return platform_driver_register(&mcb_lpc_driver); |
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} |
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static void __exit mcb_lpc_exit(void) |
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{ |
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platform_device_unregister(mcb_lpc_pdev); |
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platform_driver_unregister(&mcb_lpc_driver); |
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} |
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module_init(mcb_lpc_init); |
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module_exit(mcb_lpc_exit); |
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MODULE_AUTHOR("Andreas Werner <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("MCB over LPC support"); |
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MODULE_IMPORT_NS(MCB);
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