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 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 mem_base = pci_resource_start(dev, 0); 49 mem_len = pci_resource_len(dev, 1); 50 csr_base = pci_resource_start(dev, 1); 51 csr_len = pci_resource_len(dev, 1); 52 } else { 53 csr_base = pci_resource_start(dev, 0); 54 csr_len = pci_resource_len(dev, 0); 55 mem_base = pci_resource_start(dev, 1); 56 mem_len = pci_resource_len(dev, 1); 57 if (!mem_len) { 58 mem_base = csr_base + csr_len; 59 mem_len = csr_len; 60 } 61 } 62 63 pci_set_master(dev); 64 denali->dev = &dev->dev; 65 denali->irq = dev->irq; 66 denali->ecc_caps = &denali_pci_ecc_caps; 67 denali->nand.ecc.options |= NAND_ECC_MAXIMIZE; 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_nocache(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_nocache(mem_base, mem_len); 84 if (!denali->host) { 85 dev_err(&dev->dev, "Spectra: ioremap_nocache failed!"); 86 ret = -ENOMEM; 87 goto failed_remap_reg; 88 } 89 90 ret = denali_init(denali); 91 if (ret) 92 goto failed_remap_mem; 93 94 pci_set_drvdata(dev, denali); 95 96 return 0; 97 98 failed_remap_mem: 99 iounmap(denali->host); 100 failed_remap_reg: 101 iounmap(denali->reg); 102 return ret; 103 } 104 105 static void denali_pci_remove(struct pci_dev *dev) 106 { 107 struct denali_nand_info *denali = pci_get_drvdata(dev); 108 109 denali_remove(denali); 110 iounmap(denali->reg); 111 iounmap(denali->host); 112 } 113 114 static struct pci_driver denali_pci_driver = { 115 .name = DENALI_NAND_NAME, 116 .id_table = denali_pci_ids, 117 .probe = denali_pci_probe, 118 .remove = denali_pci_remove, 119 }; 120 module_pci_driver(denali_pci_driver); 121 122 MODULE_DESCRIPTION("PCI driver for Denali NAND controller"); 123 MODULE_AUTHOR("Intel Corporation and its suppliers"); 124 MODULE_LICENSE("GPL v2"); 125