Commit | Line | Data |
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e24c7452 | 1 | /* |
ca632f55 | 2 | * PCI interface driver for DW SPI Core |
e24c7452 FT |
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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
e24c7452 | 23 | #include <linux/spi/spi.h> |
d7614de4 | 24 | #include <linux/module.h> |
e24c7452 | 25 | |
ca632f55 | 26 | #include "spi-dw.h" |
568a60ed | 27 | |
e24c7452 FT |
28 | #define DRIVER_NAME "dw_spi_pci" |
29 | ||
30 | struct dw_spi_pci { | |
7063c0d9 FT |
31 | struct pci_dev *pdev; |
32 | struct dw_spi dws; | |
e24c7452 FT |
33 | }; |
34 | ||
fd4a319b | 35 | static int spi_pci_probe(struct pci_dev *pdev, |
e24c7452 FT |
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 | ||
e0045ebf | 43 | dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n", |
e24c7452 FT |
44 | pdev->vendor, pdev->device); |
45 | ||
04f421e7 | 46 | ret = pcim_enable_device(pdev); |
e24c7452 FT |
47 | if (ret) |
48 | return ret; | |
49 | ||
fa4934a0 BS |
50 | dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci), |
51 | GFP_KERNEL); | |
04f421e7 BS |
52 | if (!dwpci) |
53 | return -ENOMEM; | |
e24c7452 FT |
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); | |
e24c7452 | 60 | |
04f421e7 | 61 | ret = pcim_iomap_regions(pdev, 1, dev_name(&pdev->dev)); |
e24c7452 | 62 | if (ret) |
04f421e7 | 63 | return ret; |
e24c7452 | 64 | |
c9d5d6fe AS |
65 | dws->regs = pcim_iomap_table(pdev)[pci_bar]; |
66 | ||
e24c7452 FT |
67 | dws->bus_num = 0; |
68 | dws->num_cs = 4; | |
e24c7452 | 69 | dws->irq = pdev->irq; |
7063c0d9 FT |
70 | |
71 | /* | |
72 | * Specific handling for Intel MID paltforms, like dma setup, | |
73 | * clock rate, FIFO depth. | |
74 | */ | |
75 | if (pdev->device == 0x0800) { | |
76 | ret = dw_spi_mid_init(dws); | |
77 | if (ret) | |
04f421e7 | 78 | return ret; |
7063c0d9 | 79 | } |
e24c7452 | 80 | |
04f421e7 | 81 | ret = dw_spi_add_host(&pdev->dev, dws); |
e24c7452 | 82 | if (ret) |
04f421e7 | 83 | return ret; |
e24c7452 FT |
84 | |
85 | /* PCI hook and SPI hook use the same drv data */ | |
86 | pci_set_drvdata(pdev, dwpci); | |
e24c7452 | 87 | |
04f421e7 | 88 | return 0; |
e24c7452 FT |
89 | } |
90 | ||
fd4a319b | 91 | static void spi_pci_remove(struct pci_dev *pdev) |
e24c7452 FT |
92 | { |
93 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | |
94 | ||
51f921c1 | 95 | dw_spi_remove_host(&dwpci->dws); |
e24c7452 FT |
96 | } |
97 | ||
98 | #ifdef CONFIG_PM | |
99 | static int spi_suspend(struct pci_dev *pdev, pm_message_t state) | |
100 | { | |
101 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | |
102 | int ret; | |
103 | ||
104 | ret = dw_spi_suspend_host(&dwpci->dws); | |
105 | if (ret) | |
106 | return ret; | |
107 | pci_save_state(pdev); | |
108 | pci_disable_device(pdev); | |
109 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
110 | return ret; | |
111 | } | |
112 | ||
113 | static int spi_resume(struct pci_dev *pdev) | |
114 | { | |
115 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | |
116 | int ret; | |
117 | ||
118 | pci_set_power_state(pdev, PCI_D0); | |
119 | pci_restore_state(pdev); | |
120 | ret = pci_enable_device(pdev); | |
121 | if (ret) | |
122 | return ret; | |
123 | return dw_spi_resume_host(&dwpci->dws); | |
124 | } | |
125 | #else | |
126 | #define spi_suspend NULL | |
127 | #define spi_resume NULL | |
128 | #endif | |
129 | ||
9a21e477 | 130 | static const struct pci_device_id pci_ids[] = { |
7063c0d9 | 131 | /* Intel MID platform SPI controller 0 */ |
e24c7452 FT |
132 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) }, |
133 | {}, | |
134 | }; | |
135 | ||
136 | static struct pci_driver dw_spi_driver = { | |
137 | .name = DRIVER_NAME, | |
138 | .id_table = pci_ids, | |
139 | .probe = spi_pci_probe, | |
fd4a319b | 140 | .remove = spi_pci_remove, |
e24c7452 FT |
141 | .suspend = spi_suspend, |
142 | .resume = spi_resume, | |
143 | }; | |
144 | ||
8ebb35fd | 145 | module_pci_driver(dw_spi_driver); |
e24c7452 FT |
146 | |
147 | MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>"); | |
148 | MODULE_DESCRIPTION("PCI interface driver for DW SPI Core"); | |
149 | MODULE_LICENSE("GPL v2"); |