145 lines
3.6 KiB
C
145 lines
3.6 KiB
C
/*
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* NAND Flash Controller Device Driver
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* Copyright © 2009-2010, Intel Corporation and its suppliers.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include "denali.h"
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#define DENALI_NAND_NAME "denali-nand-pci"
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/* List of platforms this NAND controller has be integrated into */
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static DEFINE_PCI_DEVICE_TABLE(denali_pci_ids) = {
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{ PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 },
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{ PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST },
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{ /* end: all zeroes */ }
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};
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MODULE_DEVICE_TABLE(pci, denali_pci_ids);
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static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
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{
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int ret = -ENODEV;
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resource_size_t csr_base, mem_base;
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unsigned long csr_len, mem_len;
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struct denali_nand_info *denali;
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denali = kzalloc(sizeof(*denali), GFP_KERNEL);
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if (!denali)
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return -ENOMEM;
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ret = pci_enable_device(dev);
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if (ret) {
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pr_err("Spectra: pci_enable_device failed.\n");
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goto failed_alloc_memery;
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}
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if (id->driver_data == INTEL_CE4100) {
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denali->platform = INTEL_CE4100;
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mem_base = pci_resource_start(dev, 0);
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mem_len = pci_resource_len(dev, 1);
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csr_base = pci_resource_start(dev, 1);
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csr_len = pci_resource_len(dev, 1);
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} else {
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denali->platform = INTEL_MRST;
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csr_base = pci_resource_start(dev, 0);
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csr_len = pci_resource_len(dev, 0);
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mem_base = pci_resource_start(dev, 1);
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mem_len = pci_resource_len(dev, 1);
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if (!mem_len) {
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mem_base = csr_base + csr_len;
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mem_len = csr_len;
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}
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}
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pci_set_master(dev);
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denali->dev = &dev->dev;
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denali->irq = dev->irq;
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ret = pci_request_regions(dev, DENALI_NAND_NAME);
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if (ret) {
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pr_err("Spectra: Unable to request memory regions\n");
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goto failed_enable_dev;
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}
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denali->flash_reg = ioremap_nocache(csr_base, csr_len);
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if (!denali->flash_reg) {
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pr_err("Spectra: Unable to remap memory region\n");
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ret = -ENOMEM;
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goto failed_req_regions;
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}
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denali->flash_mem = ioremap_nocache(mem_base, mem_len);
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if (!denali->flash_mem) {
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pr_err("Spectra: ioremap_nocache failed!");
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ret = -ENOMEM;
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goto failed_remap_reg;
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}
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ret = denali_init(denali);
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if (ret)
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goto failed_remap_mem;
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pci_set_drvdata(dev, denali);
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return 0;
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failed_remap_mem:
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iounmap(denali->flash_mem);
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failed_remap_reg:
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iounmap(denali->flash_reg);
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failed_req_regions:
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pci_release_regions(dev);
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failed_enable_dev:
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pci_disable_device(dev);
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failed_alloc_memery:
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kfree(denali);
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return ret;
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}
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/* driver exit point */
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static void denali_pci_remove(struct pci_dev *dev)
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{
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struct denali_nand_info *denali = pci_get_drvdata(dev);
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denali_remove(denali);
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iounmap(denali->flash_reg);
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iounmap(denali->flash_mem);
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pci_release_regions(dev);
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pci_disable_device(dev);
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pci_set_drvdata(dev, NULL);
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kfree(denali);
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}
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static struct pci_driver denali_pci_driver = {
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.name = DENALI_NAND_NAME,
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.id_table = denali_pci_ids,
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.probe = denali_pci_probe,
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.remove = denali_pci_remove,
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};
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static int denali_init_pci(void)
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{
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pr_info("Spectra MTD driver built on %s @ %s\n", __DATE__, __TIME__);
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return pci_register_driver(&denali_pci_driver);
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}
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module_init(denali_init_pci);
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static void denali_exit_pci(void)
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{
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pci_unregister_driver(&denali_pci_driver);
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}
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module_exit(denali_exit_pci);
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