drivers/mtd/nand/raw/denali_pci.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * NAND Flash Controller Device Driver
   4  * Copyright © 2009-2010, Intel Corporation and its suppliers.
   5  */
   6
   7 #include <linux/errno.h>
   8 #include <linux/io.h>
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/pci.h>
  12
  13 #include "denali.h"
  14
  15 #define DENALI_NAND_NAME    "denali-nand-pci"
  16
  17 #define INTEL_CE4100    1
  18 #define INTEL_MRST      2
  19
  20 /* List of platforms this NAND controller has be integrated into */
  21 static const struct pci_device_id denali_pci_ids[] = {
  22         { PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 },
  23         { PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST },
  24         { /* end: all zeroes */ }
  25 };
  26 MODULE_DEVICE_TABLE(pci, denali_pci_ids);
  27
  28 NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15);
  29
  30 static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
  31 {
  32         resource_size_t csr_base, mem_base;
  33         unsigned long csr_len, mem_len;
  34         struct denali_controller *denali;
  35         struct denali_chip *dchip;
  36         int nsels, ret, i;
  37
  38         denali = devm_kzalloc(&dev->dev, sizeof(*denali), GFP_KERNEL);
  39         if (!denali)
  40                 return -ENOMEM;
  41
  42         ret = pcim_enable_device(dev);
  43         if (ret) {
  44                 dev_err(&dev->dev, "Spectra: pci_enable_device failed.\n");
  45                 return ret;
  46         }
  47
  48         if (id->driver_data == 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                 csr_base = pci_resource_start(dev, 0);
  55                 csr_len = pci_resource_len(dev, 0);
  56                 mem_base = pci_resource_start(dev, 1);
  57                 mem_len = pci_resource_len(dev, 1);
  58                 if (!mem_len) {
  59                         mem_base = csr_base + csr_len;
  60                         mem_len = csr_len;
  61                 }
  62         }
  63
  64         pci_set_master(dev);
  65         denali->dev = &dev->dev;
  66         denali->irq = dev->irq;
  67         denali->ecc_caps = &denali_pci_ecc_caps;
  68         denali->clk_rate = 50000000;            /* 50 MHz */
  69         denali->clk_x_rate = 200000000;         /* 200 MHz */
  70
  71         ret = pci_request_regions(dev, DENALI_NAND_NAME);
  72         if (ret) {
  73                 dev_err(&dev->dev, "Spectra: Unable to request memory regions\n");
  74                 return ret;
  75         }
  76
  77         denali->reg = ioremap(csr_base, csr_len);
  78         if (!denali->reg) {
  79                 dev_err(&dev->dev, "Spectra: Unable to remap memory region\n");
  80                 return -ENOMEM;
  81         }
  82
  83         denali->host = ioremap(mem_base, mem_len);
  84         if (!denali->host) {
  85                 dev_err(&dev->dev, "Spectra: ioremap failed!");
  86                 ret = -ENOMEM;
  87                 goto out_unmap_reg;
  88         }
  89
  90         ret = denali_init(denali);
  91         if (ret)
  92                 goto out_unmap_host;
  93
  94         nsels = denali->nbanks;
  95
  96         dchip = devm_kzalloc(denali->dev, struct_size(dchip, sels, nsels),
  97                              GFP_KERNEL);
  98         if (!dchip) {
  99                 ret = -ENOMEM;
 100                 goto out_remove_denali;
 101         }
 102
 103         dchip->chip.base.ecc.user_conf.flags |= NAND_ECC_MAXIMIZE_STRENGTH;
 104
 105         dchip->nsels = nsels;
 106
 107         for (i = 0; i < nsels; i++)
 108                 dchip->sels[i].bank = i;
 109
 110         ret = denali_chip_init(denali, dchip);
 111         if (ret)
 112                 goto out_remove_denali;
 113
 114         pci_set_drvdata(dev, denali);
 115
 116         return 0;
 117
 118 out_remove_denali:
 119         denali_remove(denali);
 120 out_unmap_host:
 121         iounmap(denali->host);
 122 out_unmap_reg:
 123         iounmap(denali->reg);
 124         return ret;
 125 }
 126
 127 static void denali_pci_remove(struct pci_dev *dev)
 128 {
 129         struct denali_controller *denali = pci_get_drvdata(dev);
 130
 131         denali_remove(denali);
 132         iounmap(denali->reg);
 133         iounmap(denali->host);
 134 }
 135
 136 static struct pci_driver denali_pci_driver = {
 137         .name = DENALI_NAND_NAME,
 138         .id_table = denali_pci_ids,
 139         .probe = denali_pci_probe,
 140         .remove = denali_pci_remove,
 141 };
 142 module_pci_driver(denali_pci_driver);
 143
 144 MODULE_DESCRIPTION("PCI driver for Denali NAND controller");
 145 MODULE_AUTHOR("Intel Corporation and its suppliers");
 146 MODULE_LICENSE("GPL v2");