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kernel add
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/*
* NAND Flash Controller Device Driver
* Copyright © 2009-2010, Intel Corporation and its suppliers.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include "denali.h"
#define DENALI_NAND_NAME "denali-nand-pci"
/* List of platforms this NAND controller has be integrated into */
static const struct pci_device_id denali_pci_ids[] = {
{ PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 },
{ PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST },
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, denali_pci_ids);
static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int ret;
resource_size_t csr_base, mem_base;
unsigned long csr_len, mem_len;
struct denali_nand_info *denali;
denali = devm_kzalloc(&dev->dev, sizeof(*denali), GFP_KERNEL);
if (!denali)
return -ENOMEM;
ret = pcim_enable_device(dev);
if (ret) {
dev_err(&dev->dev, "Spectra: pci_enable_device failed.
");
return ret;
}
if (id->driver_data == INTEL_CE4100) {
denali->platform = INTEL_CE4100;
mem_base = pci_resource_start(dev, 0);
mem_len = pci_resource_len(dev, 1);
csr_base = pci_resource_start(dev, 1);
csr_len = pci_resource_len(dev, 1);
} else {
denali->platform = INTEL_MRST;
csr_base = pci_resource_start(dev, 0);
csr_len = pci_resource_len(dev, 0);
mem_base = pci_resource_start(dev, 1);
mem_len = pci_resource_len(dev, 1);
if (!mem_len) {
mem_base = csr_base + csr_len;
mem_len = csr_len;
}
}
pci_set_master(dev);
denali->dev = &dev->dev;
denali->irq = dev->irq;
ret = pci_request_regions(dev, DENALI_NAND_NAME);
if (ret) {
dev_err(&dev->dev, "Spectra: Unable to request memory regions
");
return ret;
}
denali->flash_reg = ioremap_nocache(csr_base, csr_len);
if (!denali->flash_reg) {
dev_err(&dev->dev, "Spectra: Unable to remap memory region
");
return -ENOMEM;
}
denali->flash_mem = ioremap_nocache(mem_base, mem_len);
if (!denali->flash_mem) {
dev_err(&dev->dev, "Spectra: ioremap_nocache failed!");
ret = -ENOMEM;
goto failed_remap_reg;
}
ret = denali_init(denali);
if (ret)
goto failed_remap_mem;
pci_set_drvdata(dev, denali);
return 0;
failed_remap_mem:
iounmap(denali->flash_mem);
failed_remap_reg:
iounmap(denali->flash_reg);
return ret;
}
/* driver exit point */
static void denali_pci_remove(struct pci_dev *dev)
{
struct denali_nand_info *denali = pci_get_drvdata(dev);
denali_remove(denali);
iounmap(denali->flash_reg);
iounmap(denali->flash_mem);
}
static struct pci_driver denali_pci_driver = {
.name = DENALI_NAND_NAME,
.id_table = denali_pci_ids,
.probe = denali_pci_probe,
.remove = denali_pci_remove,
};
module_pci_driver(denali_pci_driver);
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