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 */
21static 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};
26MODULE_DEVICE_TABLE(pci, denali_pci_ids);
27
28NAND_ECC_CAPS_SINGLE(denali_pci_ecc_caps, denali_calc_ecc_bytes, 512, 8, 15);
29
30static 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
117out_remove_denali:
118	denali_remove(denali);
119	return ret;
120}
121
122static 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
129static 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};
135module_pci_driver(denali_pci_driver);
136
137MODULE_DESCRIPTION("PCI driver for Denali NAND controller");
138MODULE_AUTHOR("Intel Corporation and its suppliers");
139MODULE_LICENSE("GPL v2");
140