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1/*
2 * CE4100's SPI device is more or less the same one as found on PXA
3 *
4 */
5#include <linux/pci.h>
6#include <linux/platform_device.h>
7#include <linux/of_device.h>
8#include <linux/module.h>
9#include <linux/spi/pxa2xx_spi.h>
10
11struct ce4100_info {
12 struct ssp_device ssp;
13 struct platform_device *spi_pdev;
14};
15
16static DEFINE_MUTEX(ssp_lock);
17static LIST_HEAD(ssp_list);
18
19struct ssp_device *pxa_ssp_request(int port, const char *label)
20{
21 struct ssp_device *ssp = NULL;
22
23 mutex_lock(&ssp_lock);
24
25 list_for_each_entry(ssp, &ssp_list, node) {
26 if (ssp->port_id == port && ssp->use_count == 0) {
27 ssp->use_count++;
28 ssp->label = label;
29 break;
30 }
31 }
32
33 mutex_unlock(&ssp_lock);
34
35 if (&ssp->node == &ssp_list)
36 return NULL;
37
38 return ssp;
39}
40EXPORT_SYMBOL_GPL(pxa_ssp_request);
41
42void pxa_ssp_free(struct ssp_device *ssp)
43{
44 mutex_lock(&ssp_lock);
45 if (ssp->use_count) {
46 ssp->use_count--;
47 ssp->label = NULL;
48 } else
49 dev_err(&ssp->pdev->dev, "device already free\n");
50 mutex_unlock(&ssp_lock);
51}
52EXPORT_SYMBOL_GPL(pxa_ssp_free);
53
54static int __devinit ce4100_spi_probe(struct pci_dev *dev,
55 const struct pci_device_id *ent)
56{
57 int ret;
58 resource_size_t phys_beg;
59 resource_size_t phys_len;
60 struct ce4100_info *spi_info;
61 struct platform_device *pdev;
62 struct pxa2xx_spi_master spi_pdata;
63 struct ssp_device *ssp;
64
65 ret = pci_enable_device(dev);
66 if (ret)
67 return ret;
68
69 phys_beg = pci_resource_start(dev, 0);
70 phys_len = pci_resource_len(dev, 0);
71
72 if (!request_mem_region(phys_beg, phys_len,
73 "CE4100 SPI")) {
74 dev_err(&dev->dev, "Can't request register space.\n");
75 ret = -EBUSY;
76 return ret;
77 }
78
79 pdev = platform_device_alloc("pxa2xx-spi", dev->devfn);
80 spi_info = kzalloc(sizeof(*spi_info), GFP_KERNEL);
81 if (!pdev || !spi_info ) {
82 ret = -ENOMEM;
83 goto err_nomem;
84 }
85 memset(&spi_pdata, 0, sizeof(spi_pdata));
86 spi_pdata.num_chipselect = dev->devfn;
87
88 ret = platform_device_add_data(pdev, &spi_pdata, sizeof(spi_pdata));
89 if (ret)
90 goto err_nomem;
91
92 pdev->dev.parent = &dev->dev;
93 pdev->dev.of_node = dev->dev.of_node;
94 ssp = &spi_info->ssp;
95 ssp->phys_base = pci_resource_start(dev, 0);
96 ssp->mmio_base = ioremap(phys_beg, phys_len);
97 if (!ssp->mmio_base) {
98 dev_err(&pdev->dev, "failed to ioremap() registers\n");
99 ret = -EIO;
100 goto err_nomem;
101 }
102 ssp->irq = dev->irq;
103 ssp->port_id = pdev->id;
104 ssp->type = PXA25x_SSP;
105
106 mutex_lock(&ssp_lock);
107 list_add(&ssp->node, &ssp_list);
108 mutex_unlock(&ssp_lock);
109
110 pci_set_drvdata(dev, spi_info);
111
112 ret = platform_device_add(pdev);
113 if (ret)
114 goto err_dev_add;
115
116 return ret;
117
118err_dev_add:
119 pci_set_drvdata(dev, NULL);
120 mutex_lock(&ssp_lock);
121 list_del(&ssp->node);
122 mutex_unlock(&ssp_lock);
123 iounmap(ssp->mmio_base);
124
125err_nomem:
126 release_mem_region(phys_beg, phys_len);
127 platform_device_put(pdev);
128 kfree(spi_info);
129 return ret;
130}
131
132static void __devexit ce4100_spi_remove(struct pci_dev *dev)
133{
134 struct ce4100_info *spi_info;
135 struct ssp_device *ssp;
136
137 spi_info = pci_get_drvdata(dev);
138 ssp = &spi_info->ssp;
139 platform_device_unregister(spi_info->spi_pdev);
140
141 iounmap(ssp->mmio_base);
142 release_mem_region(pci_resource_start(dev, 0),
143 pci_resource_len(dev, 0));
144
145 mutex_lock(&ssp_lock);
146 list_del(&ssp->node);
147 mutex_unlock(&ssp_lock);
148
149 pci_set_drvdata(dev, NULL);
150 pci_disable_device(dev);
151 kfree(spi_info);
152}
153
154static DEFINE_PCI_DEVICE_TABLE(ce4100_spi_devices) = {
155 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e6a) },
156 { },
157};
158MODULE_DEVICE_TABLE(pci, ce4100_spi_devices);
159
160static struct pci_driver ce4100_spi_driver = {
161 .name = "ce4100_spi",
162 .id_table = ce4100_spi_devices,
163 .probe = ce4100_spi_probe,
164 .remove = __devexit_p(ce4100_spi_remove),
165};
166
167module_pci_driver(ce4100_spi_driver);
168
169MODULE_DESCRIPTION("CE4100 PCI-SPI glue code for PXA's driver");
170MODULE_LICENSE("GPL v2");
171MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
1/*
2 * CE4100's SPI device is more or less the same one as found on PXA
3 *
4 */
5#include <linux/pci.h>
6#include <linux/platform_device.h>
7#include <linux/of_device.h>
8#include <linux/module.h>
9#include <linux/spi/pxa2xx_spi.h>
10
11static int ce4100_spi_probe(struct pci_dev *dev,
12 const struct pci_device_id *ent)
13{
14 struct platform_device_info pi;
15 int ret;
16 struct platform_device *pdev;
17 struct pxa2xx_spi_master spi_pdata;
18 struct ssp_device *ssp;
19
20 ret = pcim_enable_device(dev);
21 if (ret)
22 return ret;
23
24 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
25 if (ret)
26 return ret;
27
28 memset(&spi_pdata, 0, sizeof(spi_pdata));
29 spi_pdata.num_chipselect = dev->devfn;
30
31 ssp = &spi_pdata.ssp;
32 ssp->phys_base = pci_resource_start(dev, 0);
33 ssp->mmio_base = pcim_iomap_table(dev)[0];
34 if (!ssp->mmio_base) {
35 dev_err(&dev->dev, "failed to ioremap() registers\n");
36 return -EIO;
37 }
38 ssp->irq = dev->irq;
39 ssp->port_id = dev->devfn;
40 ssp->type = PXA25x_SSP;
41
42 memset(&pi, 0, sizeof(pi));
43 pi.parent = &dev->dev;
44 pi.name = "pxa2xx-spi";
45 pi.id = ssp->port_id;
46 pi.data = &spi_pdata;
47 pi.size_data = sizeof(spi_pdata);
48
49 pdev = platform_device_register_full(&pi);
50 if (IS_ERR(pdev))
51 return PTR_ERR(pdev);
52
53 pci_set_drvdata(dev, pdev);
54
55 return 0;
56}
57
58static void ce4100_spi_remove(struct pci_dev *dev)
59{
60 struct platform_device *pdev = pci_get_drvdata(dev);
61
62 platform_device_unregister(pdev);
63}
64
65static const struct pci_device_id ce4100_spi_devices[] = {
66 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e6a) },
67 { },
68};
69MODULE_DEVICE_TABLE(pci, ce4100_spi_devices);
70
71static struct pci_driver ce4100_spi_driver = {
72 .name = "ce4100_spi",
73 .id_table = ce4100_spi_devices,
74 .probe = ce4100_spi_probe,
75 .remove = ce4100_spi_remove,
76};
77
78module_pci_driver(ce4100_spi_driver);
79
80MODULE_DESCRIPTION("CE4100 PCI-SPI glue code for PXA's driver");
81MODULE_LICENSE("GPL v2");
82MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");