tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
26static 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};
31MODULE_DEVICE_TABLE(pci, denali_pci_ids);
32
33NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15);
34
35static 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
102failed_remap_mem:
103 iounmap(denali->host);
104failed_remap_reg:
105 iounmap(denali->reg);
106 return ret;
107}
108
109/* driver exit point */
110static 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
119static 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
126module_pci_driver(denali_pci_driver);