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 15 #include <linux/errno.h> 16 #include <linux/io.h> 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/pci.h> 20 21 #include "denali.h" 22 23 #define DENALI_NAND_NAME "denali-nand-pci" 24 25 #define INTEL_CE4100 1 26 #define INTEL_MRST 2 27 28 /* List of platforms this NAND controller has be integrated into */ 29 static const struct pci_device_id denali_pci_ids[] = { 30 { PCI_VDEVICE(INTEL, 0x0701), INTEL_CE4100 }, 31 { PCI_VDEVICE(INTEL, 0x0809), INTEL_MRST }, 32 { /* end: all zeroes */ } 33 }; 34 MODULE_DEVICE_TABLE(pci, denali_pci_ids); 35 36 NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15); 37 38 static int denali_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) 39 { 40 int ret; 41 resource_size_t csr_base, mem_base; 42 unsigned long csr_len, mem_len; 43 struct denali_nand_info *denali; 44 45 denali = devm_kzalloc(&dev->dev, sizeof(*denali), GFP_KERNEL); 46 if (!denali) 47 return -ENOMEM; 48 49 ret = pcim_enable_device(dev); 50 if (ret) { 51 dev_err(&dev->dev, "Spectra: pci_enable_device failed.\n"); 52 return ret; 53 } 54 55 if (id->driver_data == INTEL_CE4100) { 56 mem_base = pci_resource_start(dev, 0); 57 mem_len = pci_resource_len(dev, 1); 58 csr_base = pci_resource_start(dev, 1); 59 csr_len = pci_resource_len(dev, 1); 60 } else { 61 csr_base = pci_resource_start(dev, 0); 62 csr_len = pci_resource_len(dev, 0); 63 mem_base = pci_resource_start(dev, 1); 64 mem_len = pci_resource_len(dev, 1); 65 if (!mem_len) { 66 mem_base = csr_base + csr_len; 67 mem_len = csr_len; 68 } 69 } 70 71 pci_set_master(dev); 72 denali->dev = &dev->dev; 73 denali->irq = dev->irq; 74 denali->ecc_caps = &denali_pci_ecc_caps; 75 denali->nand.ecc.options |= NAND_ECC_MAXIMIZE; 76 denali->clk_x_rate = 200000000; /* 200 MHz */ 77 78 ret = pci_request_regions(dev, DENALI_NAND_NAME); 79 if (ret) { 80 dev_err(&dev->dev, "Spectra: Unable to request memory regions\n"); 81 return ret; 82 } 83 84 denali->reg = ioremap_nocache(csr_base, csr_len); 85 if (!denali->reg) { 86 dev_err(&dev->dev, "Spectra: Unable to remap memory region\n"); 87 return -ENOMEM; 88 } 89 90 denali->host = ioremap_nocache(mem_base, mem_len); 91 if (!denali->host) { 92 dev_err(&dev->dev, "Spectra: ioremap_nocache failed!"); 93 ret = -ENOMEM; 94 goto failed_remap_reg; 95 } 96 97 ret = denali_init(denali); 98 if (ret) 99 goto failed_remap_mem; 100 101 pci_set_drvdata(dev, denali); 102 103 return 0; 104 105 failed_remap_mem: 106 iounmap(denali->host); 107 failed_remap_reg: 108 iounmap(denali->reg); 109 return ret; 110 } 111 112 static void denali_pci_remove(struct pci_dev *dev) 113 { 114 struct denali_nand_info *denali = pci_get_drvdata(dev); 115 116 denali_remove(denali); 117 iounmap(denali->reg); 118 iounmap(denali->host); 119 } 120 121 static struct pci_driver denali_pci_driver = { 122 .name = DENALI_NAND_NAME, 123 .id_table = denali_pci_ids, 124 .probe = denali_pci_probe, 125 .remove = denali_pci_remove, 126 }; 127 module_pci_driver(denali_pci_driver); 128 129 MODULE_DESCRIPTION("PCI driver for Denali NAND controller"); 130 MODULE_AUTHOR("Intel Corporation and its suppliers"); 131 MODULE_LICENSE("GPL v2"); 132