xref: /openbmc/linux/drivers/mtd/nand/raw/denali_pci.c (revision 3830dbdf)
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 
denali_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)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 = devm_ioremap(denali->dev, 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 = devm_ioremap(denali->dev, mem_base, mem_len);
84 	if (!denali->host) {
85 		dev_err(&dev->dev, "Spectra: ioremap failed!");
86 		return -ENOMEM;
87 	}
88 
89 	ret = denali_init(denali);
90 	if (ret)
91 		return ret;
92 
93 	nsels = denali->nbanks;
94 
95 	dchip = devm_kzalloc(denali->dev, struct_size(dchip, sels, nsels),
96 			     GFP_KERNEL);
97 	if (!dchip) {
98 		ret = -ENOMEM;
99 		goto out_remove_denali;
100 	}
101 
102 	dchip->chip.base.ecc.user_conf.flags |= NAND_ECC_MAXIMIZE_STRENGTH;
103 
104 	dchip->nsels = nsels;
105 
106 	for (i = 0; i < nsels; i++)
107 		dchip->sels[i].bank = i;
108 
109 	ret = denali_chip_init(denali, dchip);
110 	if (ret)
111 		goto out_remove_denali;
112 
113 	pci_set_drvdata(dev, denali);
114 
115 	return 0;
116 
117 out_remove_denali:
118 	denali_remove(denali);
119 	return ret;
120 }
121 
denali_pci_remove(struct pci_dev * dev)122 static void denali_pci_remove(struct pci_dev *dev)
123 {
124 	struct denali_controller *denali = pci_get_drvdata(dev);
125 
126 	denali_remove(denali);
127 }
128 
129 static struct pci_driver denali_pci_driver = {
130 	.name = DENALI_NAND_NAME,
131 	.id_table = denali_pci_ids,
132 	.probe = denali_pci_probe,
133 	.remove = denali_pci_remove,
134 };
135 module_pci_driver(denali_pci_driver);
136 
137 MODULE_DESCRIPTION("PCI driver for Denali NAND controller");
138 MODULE_AUTHOR("Intel Corporation and its suppliers");
139 MODULE_LICENSE("GPL v2");
140