drivers/mtd/nand/denali_pci.c

   1 /*
   2  * NAND Flash Controller Device Driver
   3  * Copyright © 2009-2010, Intel Corporation and its suppliers.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  */
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/pci.h>
  17
  18 #include "denali.h"
  19
  20 #define DENALI_NAND_NAME    "denali-nand-pci"
  21
  22 /* List of platforms this NAND controller has be integrated into */
  23 static const struct pci_device_id denali_pci_ids[] = {
  24         { PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 },
  25         { PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST },
  26         { /* end: all zeroes */ }
  27 };
  28 MODULE_DEVICE_TABLE(pci, denali_pci_ids);
  29
  30 static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
  31 {
  32         int ret;
  33         resource_size_t csr_base, mem_base;
  34         unsigned long csr_len, mem_len;
  35         struct denali_nand_info *denali;
  36
  37         denali = devm_kzalloc(&dev->dev, sizeof(*denali), GFP_KERNEL);
  38         if (!denali)
  39                 return -ENOMEM;
  40
  41         ret = pcim_enable_device(dev);
  42         if (ret) {
  43                 dev_err(&dev->dev, "Spectra: pci_enable_device failed.\n");
  44                 return ret;
  45         }
  46
  47         if (id->driver_data == INTEL_CE4100) {
  48                 denali->platform = INTEL_CE4100;
  49                 mem_base = pci_resource_start(dev, 0);
  50                 mem_len = pci_resource_len(dev, 1);
  51                 csr_base = pci_resource_start(dev, 1);
  52                 csr_len = pci_resource_len(dev, 1);
  53         } else {
  54                 denali->platform = INTEL_MRST;
  55                 csr_base = pci_resource_start(dev, 0);
  56                 csr_len = pci_resource_len(dev, 0);
  57                 mem_base = pci_resource_start(dev, 1);
  58                 mem_len = pci_resource_len(dev, 1);
  59                 if (!mem_len) {
  60                         mem_base = csr_base + csr_len;
  61                         mem_len = csr_len;
  62                 }
  63         }
  64
  65         pci_set_master(dev);
  66         denali->dev = &dev->dev;
  67         denali->irq = dev->irq;
  68
  69         ret = pci_request_regions(dev, DENALI_NAND_NAME);
  70         if (ret) {
  71                 dev_err(&dev->dev, "Spectra: Unable to request memory regions\n");
  72                 return ret;
  73         }
  74
  75         denali->flash_reg = ioremap_nocache(csr_base, csr_len);
  76         if (!denali->flash_reg) {
  77                 dev_err(&dev->dev, "Spectra: Unable to remap memory region\n");
  78                 return -ENOMEM;
  79         }
  80
  81         denali->flash_mem = ioremap_nocache(mem_base, mem_len);
  82         if (!denali->flash_mem) {
  83                 dev_err(&dev->dev, "Spectra: ioremap_nocache failed!");
  84                 ret = -ENOMEM;
  85                 goto failed_remap_reg;
  86         }
  87
  88         ret = denali_init(denali);
  89         if (ret)
  90                 goto failed_remap_mem;
  91
  92         pci_set_drvdata(dev, denali);
  93
  94         return 0;
  95
  96 failed_remap_mem:
  97         iounmap(denali->flash_mem);
  98 failed_remap_reg:
  99         iounmap(denali->flash_reg);
 100         return ret;
 101 }
 102
 103 /* driver exit point */
 104 static void denali_pci_remove(struct pci_dev *dev)
 105 {
 106         struct denali_nand_info *denali = pci_get_drvdata(dev);
 107
 108         denali_remove(denali);
 109         iounmap(denali->flash_reg);
 110         iounmap(denali->flash_mem);
 111 }
 112
 113 static struct pci_driver denali_pci_driver = {
 114         .name = DENALI_NAND_NAME,
 115         .id_table = denali_pci_ids,
 116         .probe = denali_pci_probe,
 117         .remove = denali_pci_remove,
 118 };
 119
 120 module_pci_driver(denali_pci_driver);