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1/*
2 * PCI interface driver for DW SPI Core
3 *
4 * Copyright (c) 2009, 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 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20#include <linux/interrupt.h>
21#include <linux/pci.h>
22#include <linux/slab.h>
23#include <linux/spi/spi.h>
24#include <linux/module.h>
25
26#include "spi-dw.h"
27
28#define DRIVER_NAME "dw_spi_pci"
29
30struct dw_spi_pci {
31 struct pci_dev *pdev;
32 struct dw_spi dws;
33};
34
35static int __devinit spi_pci_probe(struct pci_dev *pdev,
36 const struct pci_device_id *ent)
37{
38 struct dw_spi_pci *dwpci;
39 struct dw_spi *dws;
40 int pci_bar = 0;
41 int ret;
42
43 printk(KERN_INFO "DW: found PCI SPI controller(ID: %04x:%04x)\n",
44 pdev->vendor, pdev->device);
45
46 ret = pci_enable_device(pdev);
47 if (ret)
48 return ret;
49
50 dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL);
51 if (!dwpci) {
52 ret = -ENOMEM;
53 goto err_disable;
54 }
55
56 dwpci->pdev = pdev;
57 dws = &dwpci->dws;
58
59 /* Get basic io resource and map it */
60 dws->paddr = pci_resource_start(pdev, pci_bar);
61 dws->iolen = pci_resource_len(pdev, pci_bar);
62
63 ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev));
64 if (ret)
65 goto err_kfree;
66
67 dws->regs = ioremap_nocache((unsigned long)dws->paddr,
68 pci_resource_len(pdev, pci_bar));
69 if (!dws->regs) {
70 ret = -ENOMEM;
71 goto err_release_reg;
72 }
73
74 dws->parent_dev = &pdev->dev;
75 dws->bus_num = 0;
76 dws->num_cs = 4;
77 dws->irq = pdev->irq;
78
79 /*
80 * Specific handling for Intel MID paltforms, like dma setup,
81 * clock rate, FIFO depth.
82 */
83 if (pdev->device == 0x0800) {
84 ret = dw_spi_mid_init(dws);
85 if (ret)
86 goto err_unmap;
87 }
88
89 ret = dw_spi_add_host(dws);
90 if (ret)
91 goto err_unmap;
92
93 /* PCI hook and SPI hook use the same drv data */
94 pci_set_drvdata(pdev, dwpci);
95 return 0;
96
97err_unmap:
98 iounmap(dws->regs);
99err_release_reg:
100 pci_release_region(pdev, pci_bar);
101err_kfree:
102 kfree(dwpci);
103err_disable:
104 pci_disable_device(pdev);
105 return ret;
106}
107
108static void __devexit spi_pci_remove(struct pci_dev *pdev)
109{
110 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
111
112 pci_set_drvdata(pdev, NULL);
113 dw_spi_remove_host(&dwpci->dws);
114 iounmap(dwpci->dws.regs);
115 pci_release_region(pdev, 0);
116 kfree(dwpci);
117 pci_disable_device(pdev);
118}
119
120#ifdef CONFIG_PM
121static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
122{
123 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
124 int ret;
125
126 ret = dw_spi_suspend_host(&dwpci->dws);
127 if (ret)
128 return ret;
129 pci_save_state(pdev);
130 pci_disable_device(pdev);
131 pci_set_power_state(pdev, pci_choose_state(pdev, state));
132 return ret;
133}
134
135static int spi_resume(struct pci_dev *pdev)
136{
137 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
138 int ret;
139
140 pci_set_power_state(pdev, PCI_D0);
141 pci_restore_state(pdev);
142 ret = pci_enable_device(pdev);
143 if (ret)
144 return ret;
145 return dw_spi_resume_host(&dwpci->dws);
146}
147#else
148#define spi_suspend NULL
149#define spi_resume NULL
150#endif
151
152static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
153 /* Intel MID platform SPI controller 0 */
154 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
155 {},
156};
157
158static struct pci_driver dw_spi_driver = {
159 .name = DRIVER_NAME,
160 .id_table = pci_ids,
161 .probe = spi_pci_probe,
162 .remove = __devexit_p(spi_pci_remove),
163 .suspend = spi_suspend,
164 .resume = spi_resume,
165};
166
167module_pci_driver(dw_spi_driver);
168
169MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
170MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
171MODULE_LICENSE("GPL v2");
1/*
2 * PCI interface driver for DW SPI Core
3 *
4 * Copyright (c) 2009, 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 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20#include <linux/interrupt.h>
21#include <linux/pci.h>
22#include <linux/slab.h>
23#include <linux/spi/spi.h>
24#include <linux/module.h>
25
26#include "spi-dw.h"
27
28#define DRIVER_NAME "dw_spi_pci"
29
30struct dw_spi_pci {
31 struct pci_dev *pdev;
32 struct dw_spi dws;
33};
34
35static int spi_pci_probe(struct pci_dev *pdev,
36 const struct pci_device_id *ent)
37{
38 struct dw_spi_pci *dwpci;
39 struct dw_spi *dws;
40 int pci_bar = 0;
41 int ret;
42
43 dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
44 pdev->vendor, pdev->device);
45
46 ret = pcim_enable_device(pdev);
47 if (ret)
48 return ret;
49
50 dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci),
51 GFP_KERNEL);
52 if (!dwpci)
53 return -ENOMEM;
54
55 dwpci->pdev = pdev;
56 dws = &dwpci->dws;
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, dev_name(&pdev->dev));
62 if (ret)
63 return ret;
64
65 dws->bus_num = 0;
66 dws->num_cs = 4;
67 dws->irq = pdev->irq;
68
69 /*
70 * Specific handling for Intel MID paltforms, like dma setup,
71 * clock rate, FIFO depth.
72 */
73 if (pdev->device == 0x0800) {
74 ret = dw_spi_mid_init(dws);
75 if (ret)
76 return ret;
77 }
78
79 ret = dw_spi_add_host(&pdev->dev, dws);
80 if (ret)
81 return ret;
82
83 /* PCI hook and SPI hook use the same drv data */
84 pci_set_drvdata(pdev, dwpci);
85
86 return 0;
87}
88
89static void spi_pci_remove(struct pci_dev *pdev)
90{
91 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
92
93 dw_spi_remove_host(&dwpci->dws);
94}
95
96#ifdef CONFIG_PM
97static int spi_suspend(struct pci_dev *pdev, pm_message_t state)
98{
99 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
100 int ret;
101
102 ret = dw_spi_suspend_host(&dwpci->dws);
103 if (ret)
104 return ret;
105 pci_save_state(pdev);
106 pci_disable_device(pdev);
107 pci_set_power_state(pdev, pci_choose_state(pdev, state));
108 return ret;
109}
110
111static int spi_resume(struct pci_dev *pdev)
112{
113 struct dw_spi_pci *dwpci = pci_get_drvdata(pdev);
114 int ret;
115
116 pci_set_power_state(pdev, PCI_D0);
117 pci_restore_state(pdev);
118 ret = pci_enable_device(pdev);
119 if (ret)
120 return ret;
121 return dw_spi_resume_host(&dwpci->dws);
122}
123#else
124#define spi_suspend NULL
125#define spi_resume NULL
126#endif
127
128static const struct pci_device_id pci_ids[] = {
129 /* Intel MID platform SPI controller 0 */
130 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) },
131 {},
132};
133
134static struct pci_driver dw_spi_driver = {
135 .name = DRIVER_NAME,
136 .id_table = pci_ids,
137 .probe = spi_pci_probe,
138 .remove = spi_pci_remove,
139 .suspend = spi_suspend,
140 .resume = spi_resume,
141};
142
143module_pci_driver(dw_spi_driver);
144
145MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
146MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
147MODULE_LICENSE("GPL v2");