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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 | ||
04f421e7 | 43 | ret = pcim_enable_device(pdev); |
e24c7452 FT |
44 | if (ret) |
45 | return ret; | |
46 | ||
fa4934a0 BS |
47 | dwpci = devm_kzalloc(&pdev->dev, sizeof(struct dw_spi_pci), |
48 | GFP_KERNEL); | |
04f421e7 BS |
49 | if (!dwpci) |
50 | return -ENOMEM; | |
e24c7452 FT |
51 | |
52 | dwpci->pdev = pdev; | |
53 | dws = &dwpci->dws; | |
54 | ||
55 | /* Get basic io resource and map it */ | |
56 | dws->paddr = pci_resource_start(pdev, pci_bar); | |
e24c7452 | 57 | |
ceb86de9 | 58 | ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev)); |
e24c7452 | 59 | if (ret) |
04f421e7 | 60 | return ret; |
e24c7452 | 61 | |
e24c7452 FT |
62 | dws->bus_num = 0; |
63 | dws->num_cs = 4; | |
e24c7452 | 64 | dws->irq = pdev->irq; |
7063c0d9 FT |
65 | |
66 | /* | |
67 | * Specific handling for Intel MID paltforms, like dma setup, | |
68 | * clock rate, FIFO depth. | |
69 | */ | |
70 | if (pdev->device == 0x0800) { | |
71 | ret = dw_spi_mid_init(dws); | |
72 | if (ret) | |
04f421e7 | 73 | return ret; |
7063c0d9 | 74 | } |
e24c7452 | 75 | |
04f421e7 | 76 | ret = dw_spi_add_host(&pdev->dev, dws); |
e24c7452 | 77 | if (ret) |
04f421e7 | 78 | return ret; |
e24c7452 FT |
79 | |
80 | /* PCI hook and SPI hook use the same drv data */ | |
81 | pci_set_drvdata(pdev, dwpci); | |
e24c7452 | 82 | |
fcf0af44 AS |
83 | dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n", |
84 | pdev->vendor, pdev->device); | |
85 | ||
04f421e7 | 86 | return 0; |
e24c7452 FT |
87 | } |
88 | ||
fd4a319b | 89 | static void spi_pci_remove(struct pci_dev *pdev) |
e24c7452 FT |
90 | { |
91 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | |
92 | ||
51f921c1 | 93 | dw_spi_remove_host(&dwpci->dws); |
e24c7452 FT |
94 | } |
95 | ||
35f2d413 AS |
96 | #ifdef CONFIG_PM_SLEEP |
97 | static int spi_suspend(struct device *dev) | |
e24c7452 | 98 | { |
35f2d413 | 99 | struct pci_dev *pdev = to_pci_dev(dev); |
e24c7452 | 100 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); |
e24c7452 | 101 | |
35f2d413 | 102 | return dw_spi_suspend_host(&dwpci->dws); |
e24c7452 FT |
103 | } |
104 | ||
35f2d413 | 105 | static int spi_resume(struct device *dev) |
e24c7452 | 106 | { |
35f2d413 | 107 | struct pci_dev *pdev = to_pci_dev(dev); |
e24c7452 | 108 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); |
e24c7452 | 109 | |
e24c7452 FT |
110 | return dw_spi_resume_host(&dwpci->dws); |
111 | } | |
e24c7452 FT |
112 | #endif |
113 | ||
35f2d413 AS |
114 | static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume); |
115 | ||
9a21e477 | 116 | static const struct pci_device_id pci_ids[] = { |
7063c0d9 | 117 | /* Intel MID platform SPI controller 0 */ |
e24c7452 FT |
118 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) }, |
119 | {}, | |
120 | }; | |
121 | ||
122 | static struct pci_driver dw_spi_driver = { | |
123 | .name = DRIVER_NAME, | |
124 | .id_table = pci_ids, | |
125 | .probe = spi_pci_probe, | |
fd4a319b | 126 | .remove = spi_pci_remove, |
35f2d413 AS |
127 | .driver = { |
128 | .pm = &dw_spi_pm_ops, | |
129 | }, | |
e24c7452 FT |
130 | }; |
131 | ||
8ebb35fd | 132 | module_pci_driver(dw_spi_driver); |
e24c7452 FT |
133 | |
134 | MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>"); | |
135 | MODULE_DESCRIPTION("PCI interface driver for DW SPI Core"); | |
136 | MODULE_LICENSE("GPL v2"); |