Merge branch 'ras-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.git] / drivers / spi / spi-dw-pci.c
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
18 struct spi_pci_desc {
19         int     (*setup)(struct dw_spi *);
20         u16     num_cs;
21         u16     bus_num;
22 };
23
24 static struct spi_pci_desc spi_pci_mid_desc_1 = {
25         .setup = dw_spi_mid_init,
26         .num_cs = 5,
27         .bus_num = 0,
28 };
29
30 static struct spi_pci_desc spi_pci_mid_desc_2 = {
31         .setup = dw_spi_mid_init,
32         .num_cs = 2,
33         .bus_num = 1,
34 };
35
36 static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
37 {
38         struct dw_spi *dws;
39         struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;
40         int pci_bar = 0;
41         int ret;
42
43         ret = pcim_enable_device(pdev);
44         if (ret)
45                 return ret;
46
47         dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL);
48         if (!dws)
49                 return -ENOMEM;
50
51         /* Get basic io resource and map it */
52         dws->paddr = pci_resource_start(pdev, pci_bar);
53
54         ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
55         if (ret)
56                 return ret;
57
58         dws->regs = pcim_iomap_table(pdev)[pci_bar];
59         dws->irq = pdev->irq;
60
61         /*
62          * Specific handling for platforms, like dma setup,
63          * clock rate, FIFO depth.
64          */
65         if (desc) {
66                 dws->num_cs = desc->num_cs;
67                 dws->bus_num = desc->bus_num;
68
69                 if (desc->setup) {
70                         ret = desc->setup(dws);
71                         if (ret)
72                                 return ret;
73                 }
74         } else {
75                 return -ENODEV;
76         }
77
78         ret = dw_spi_add_host(&pdev->dev, dws);
79         if (ret)
80                 return ret;
81
82         /* PCI hook and SPI hook use the same drv data */
83         pci_set_drvdata(pdev, dws);
84
85         dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
86                 pdev->vendor, pdev->device);
87
88         return 0;
89 }
90
91 static void spi_pci_remove(struct pci_dev *pdev)
92 {
93         struct dw_spi *dws = pci_get_drvdata(pdev);
94
95         dw_spi_remove_host(dws);
96 }
97
98 #ifdef CONFIG_PM_SLEEP
99 static int spi_suspend(struct device *dev)
100 {
101         struct pci_dev *pdev = to_pci_dev(dev);
102         struct dw_spi *dws = pci_get_drvdata(pdev);
103
104         return dw_spi_suspend_host(dws);
105 }
106
107 static int spi_resume(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_resume_host(dws);
113 }
114 #endif
115
116 static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
117
118 static const struct pci_device_id pci_ids[] = {
119         /* Intel MID platform SPI controller 0 */
120         /*
121          * The access to the device 8086:0801 is disabled by HW, since it's
122          * exclusively used by SCU to communicate with MSIC.
123          */
124         /* Intel MID platform SPI controller 1 */
125         { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
126         /* Intel MID platform SPI controller 2 */
127         { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
128         {},
129 };
130
131 static struct pci_driver dw_spi_driver = {
132         .name =         DRIVER_NAME,
133         .id_table =     pci_ids,
134         .probe =        spi_pci_probe,
135         .remove =       spi_pci_remove,
136         .driver         = {
137                 .pm     = &dw_spi_pm_ops,
138         },
139 };
140
141 module_pci_driver(dw_spi_driver);
142
143 MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
144 MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
145 MODULE_LICENSE("GPL v2");