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 #define INTEL_CE4100    1
  23 #define INTEL_MRST      2
  24
  25 /* List of platforms this NAND controller has be integrated into */
  26 static const struct pci_device_id denali_pci_ids[] = {
  27         { PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 },
  28         { PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST },
  29         { /* end: all zeroes */ }
  30 };
  31 MODULE_DEVICE_TABLE(pci, denali_pci_ids);
  32
  33 NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15);
  34
  35 static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
  36 {
  37         int ret;
  38         resource_size_t csr_base, mem_base;
  39         unsigned long csr_len, mem_len;
  40         struct denali_nand_info *denali;
  41
  42         denali = devm_kzalloc(&dev->dev, sizeof(*denali), GFP_KERNEL);
  43         if (!denali)
  44                 return -ENOMEM;
  45
  46         ret = pcim_enable_device(dev);
  47         if (ret) {
  48                 dev_err(&dev->dev, "Spectra: pci_enable_device failed.\n");
  49                 return ret;
  50         }
  51
  52         if (id->driver_data == INTEL_CE4100) {
  53                 mem_base = pci_resource_start(dev, 0);
  54                 mem_len = pci_resource_len(dev, 1);
  55                 csr_base = pci_resource_start(dev, 1);
  56                 csr_len = pci_resource_len(dev, 1);
  57         } else {
  58                 csr_base = pci_resource_start(dev, 0);
  59                 csr_len = pci_resource_len(dev, 0);
  60                 mem_base = pci_resource_start(dev, 1);
  61                 mem_len = pci_resource_len(dev, 1);
  62                 if (!mem_len) {
  63                         mem_base = csr_base + csr_len;
  64                         mem_len = csr_len;
  65                 }
  66         }
  67
  68         pci_set_master(dev);
  69         denali->dev = &dev->dev;
  70         denali->irq = dev->irq;
  71         denali->ecc_caps = &denali_pci_ecc_caps;
  72         denali->nand.ecc.options |= NAND_ECC_MAXIMIZE;
  73         denali->clk_x_rate = 200000000;         /* 200 MHz */
  74
  75         ret = pci_request_regions(dev, DENALI_NAND_NAME);
  76         if (ret) {
  77                 dev_err(&dev->dev, "Spectra: Unable to request memory regions\n");
  78                 return ret;
  79         }
  80
  81         denali->reg = ioremap_nocache(csr_base, csr_len);
  82         if (!denali->reg) {
  83                 dev_err(&dev->dev, "Spectra: Unable to remap memory region\n");
  84                 return -ENOMEM;
  85         }
  86
  87         denali->host = ioremap_nocache(mem_base, mem_len);
  88         if (!denali->host) {
  89                 dev_err(&dev->dev, "Spectra: ioremap_nocache failed!");
  90                 ret = -ENOMEM;
  91                 goto failed_remap_reg;
  92         }
  93
  94         ret = denali_init(denali);
  95         if (ret)
  96                 goto failed_remap_mem;
  97
  98         pci_set_drvdata(dev, denali);
  99
 100         return 0;
 101
 102 failed_remap_mem:
 103         iounmap(denali->host);
 104 failed_remap_reg:
 105         iounmap(denali->reg);
 106         return ret;
 107 }
 108
 109 /* driver exit point */
 110 static void denali_pci_remove(struct pci_dev *dev)
 111 {
 112         struct denali_nand_info *denali = pci_get_drvdata(dev);
 113
 114         denali_remove(denali);
 115         iounmap(denali->reg);
 116         iounmap(denali->host);
 117 }
 118
 119 static struct pci_driver denali_pci_driver = {
 120         .name = DENALI_NAND_NAME,
 121         .id_table = denali_pci_ids,
 122         .probe = denali_pci_probe,
 123         .remove = denali_pci_remove,
 124 };
 125
 126 module_pci_driver(denali_pci_driver);
 127
 128 MODULE_DESCRIPTION("PCI driver for Denali NAND controller");
 129 MODULE_AUTHOR("Intel Corporation and its suppliers");
 130 MODULE_LICENSE("GPL v2");