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1/*
2 * PCI interface driver for DW SPI Core
3 *
4 * Copyright (c) 2009, 2014 Intel Corporation.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 */
15
16#include <linux/interrupt.h>
17#include <linux/pci.h>
18#include <linux/slab.h>
19#include <linux/spi/spi.h>
20#include <linux/module.h>
21
22#include "spi-dw.h"
23
24#define DRIVER_NAME "dw_spi_pci"
25
26struct spi_pci_desc {
27 int (*setup)(struct dw_spi *);
28 u16 num_cs;
29 u16 bus_num;
30};
31
32static struct spi_pci_desc spi_pci_mid_desc_1 = {
33 .setup = dw_spi_mid_init,
34 .num_cs = 5,
35 .bus_num = 0,
36};
37
38static struct spi_pci_desc spi_pci_mid_desc_2 = {
39 .setup = dw_spi_mid_init,
40 .num_cs = 2,
41 .bus_num = 1,
42};
43
44static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
45{
46 struct dw_spi *dws;
47 struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;
48 int pci_bar = 0;
49 int ret;
50
51 ret = pcim_enable_device(pdev);
52 if (ret)
53 return ret;
54
55 dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL);
56 if (!dws)
57 return -ENOMEM;
58
59 /* Get basic io resource and map it */
60 dws->paddr = pci_resource_start(pdev, pci_bar);
61
62 ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
63 if (ret)
64 return ret;
65
66 dws->regs = pcim_iomap_table(pdev)[pci_bar];
67 dws->irq = pdev->irq;
68
69 /*
70 * Specific handling for paltforms, like dma setup,
71 * clock rate, FIFO depth.
72 */
73 if (desc) {
74 dws->num_cs = desc->num_cs;
75 dws->bus_num = desc->bus_num;
76
77 if (desc->setup) {
78 ret = desc->setup(dws);
79 if (ret)
80 return ret;
81 }
82 } else {
83 return -ENODEV;
84 }
85
86 ret = dw_spi_add_host(&pdev->dev, dws);
87 if (ret)
88 return ret;
89
90 /* PCI hook and SPI hook use the same drv data */
91 pci_set_drvdata(pdev, dws);
92
93 dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
94 pdev->vendor, pdev->device);
95
96 return 0;
97}
98
99static void spi_pci_remove(struct pci_dev *pdev)
100{
101 struct dw_spi *dws = pci_get_drvdata(pdev);
102
103 dw_spi_remove_host(dws);
104}
105
106#ifdef CONFIG_PM_SLEEP
107static int spi_suspend(struct device *dev)
108{
109 struct pci_dev *pdev = to_pci_dev(dev);
110 struct dw_spi *dws = pci_get_drvdata(pdev);
111
112 return dw_spi_suspend_host(dws);
113}
114
115static int spi_resume(struct device *dev)
116{
117 struct pci_dev *pdev = to_pci_dev(dev);
118 struct dw_spi *dws = pci_get_drvdata(pdev);
119
120 return dw_spi_resume_host(dws);
121}
122#endif
123
124static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
125
126static const struct pci_device_id pci_ids[] = {
127 /* Intel MID platform SPI controller 0 */
128 /*
129 * The access to the device 8086:0801 is disabled by HW, since it's
130 * exclusively used by SCU to communicate with MSIC.
131 */
132 /* Intel MID platform SPI controller 1 */
133 { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
134 /* Intel MID platform SPI controller 2 */
135 { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
136 {},
137};
138
139static struct pci_driver dw_spi_driver = {
140 .name = DRIVER_NAME,
141 .id_table = pci_ids,
142 .probe = spi_pci_probe,
143 .remove = spi_pci_remove,
144 .driver = {
145 .pm = &dw_spi_pm_ops,
146 },
147};
148
149module_pci_driver(dw_spi_driver);
150
151MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
152MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
153MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * PCI interface driver for DW SPI Core
4 *
5 * Copyright (c) 2009, 2014 Intel Corporation.
6 */
7
8#include <linux/interrupt.h>
9#include <linux/pci.h>
10#include <linux/slab.h>
11#include <linux/spi/spi.h>
12#include <linux/module.h>
13
14#include "spi-dw.h"
15
16#define DRIVER_NAME "dw_spi_pci"
17
18struct spi_pci_desc {
19 int (*setup)(struct dw_spi *);
20 u16 num_cs;
21 u16 bus_num;
22 u32 max_freq;
23};
24
25static struct spi_pci_desc spi_pci_mid_desc_1 = {
26 .setup = dw_spi_mid_init,
27 .num_cs = 5,
28 .bus_num = 0,
29};
30
31static struct spi_pci_desc spi_pci_mid_desc_2 = {
32 .setup = dw_spi_mid_init,
33 .num_cs = 2,
34 .bus_num = 1,
35};
36
37static struct spi_pci_desc spi_pci_ehl_desc = {
38 .num_cs = 1,
39 .bus_num = -1,
40 .max_freq = 100000000,
41};
42
43static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
44{
45 struct dw_spi *dws;
46 struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;
47 int pci_bar = 0;
48 int ret;
49
50 ret = pcim_enable_device(pdev);
51 if (ret)
52 return ret;
53
54 dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL);
55 if (!dws)
56 return -ENOMEM;
57
58 /* Get basic io resource and map it */
59 dws->paddr = pci_resource_start(pdev, pci_bar);
60
61 ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
62 if (ret)
63 return ret;
64
65 dws->regs = pcim_iomap_table(pdev)[pci_bar];
66 dws->irq = pdev->irq;
67
68 /*
69 * Specific handling for platforms, like dma setup,
70 * clock rate, FIFO depth.
71 */
72 if (desc) {
73 dws->num_cs = desc->num_cs;
74 dws->bus_num = desc->bus_num;
75 dws->max_freq = desc->max_freq;
76
77 if (desc->setup) {
78 ret = desc->setup(dws);
79 if (ret)
80 return ret;
81 }
82 } else {
83 return -ENODEV;
84 }
85
86 ret = dw_spi_add_host(&pdev->dev, dws);
87 if (ret)
88 return ret;
89
90 /* PCI hook and SPI hook use the same drv data */
91 pci_set_drvdata(pdev, dws);
92
93 dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
94 pdev->vendor, pdev->device);
95
96 return 0;
97}
98
99static void spi_pci_remove(struct pci_dev *pdev)
100{
101 struct dw_spi *dws = pci_get_drvdata(pdev);
102
103 dw_spi_remove_host(dws);
104}
105
106#ifdef CONFIG_PM_SLEEP
107static int spi_suspend(struct device *dev)
108{
109 struct dw_spi *dws = dev_get_drvdata(dev);
110
111 return dw_spi_suspend_host(dws);
112}
113
114static int spi_resume(struct device *dev)
115{
116 struct dw_spi *dws = dev_get_drvdata(dev);
117
118 return dw_spi_resume_host(dws);
119}
120#endif
121
122static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
123
124static const struct pci_device_id pci_ids[] = {
125 /* Intel MID platform SPI controller 0 */
126 /*
127 * The access to the device 8086:0801 is disabled by HW, since it's
128 * exclusively used by SCU to communicate with MSIC.
129 */
130 /* Intel MID platform SPI controller 1 */
131 { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
132 /* Intel MID platform SPI controller 2 */
133 { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
134 /* Intel Elkhart Lake PSE SPI controllers */
135 { PCI_VDEVICE(INTEL, 0x4b84), (kernel_ulong_t)&spi_pci_ehl_desc},
136 { PCI_VDEVICE(INTEL, 0x4b85), (kernel_ulong_t)&spi_pci_ehl_desc},
137 { PCI_VDEVICE(INTEL, 0x4b86), (kernel_ulong_t)&spi_pci_ehl_desc},
138 { PCI_VDEVICE(INTEL, 0x4b87), (kernel_ulong_t)&spi_pci_ehl_desc},
139 {},
140};
141MODULE_DEVICE_TABLE(pci, pci_ids);
142
143static struct pci_driver dw_spi_driver = {
144 .name = DRIVER_NAME,
145 .id_table = pci_ids,
146 .probe = spi_pci_probe,
147 .remove = spi_pci_remove,
148 .driver = {
149 .pm = &dw_spi_pm_ops,
150 },
151};
152
153module_pci_driver(dw_spi_driver);
154
155MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
156MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
157MODULE_LICENSE("GPL v2");