Commit | Line | Data |
---|---|---|
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 | ||
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; | |
e24c7452 | 77 | dws->irq = pdev->irq; |
7063c0d9 FT |
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 | } | |
e24c7452 FT |
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 | ||
97 | err_unmap: | |
98 | iounmap(dws->regs); | |
99 | err_release_reg: | |
100 | pci_release_region(pdev, pci_bar); | |
101 | err_kfree: | |
102 | kfree(dwpci); | |
103 | err_disable: | |
104 | pci_disable_device(pdev); | |
105 | return ret; | |
106 | } | |
107 | ||
fd4a319b | 108 | static void spi_pci_remove(struct pci_dev *pdev) |
e24c7452 FT |
109 | { |
110 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | |
111 | ||
112 | pci_set_drvdata(pdev, NULL); | |
51f921c1 | 113 | dw_spi_remove_host(&dwpci->dws); |
e24c7452 FT |
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 | |
121 | static 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 | ||
135 | static 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 | ||
e290cf27 | 152 | static DEFINE_PCI_DEVICE_TABLE(pci_ids) = { |
7063c0d9 | 153 | /* Intel MID platform SPI controller 0 */ |
e24c7452 FT |
154 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) }, |
155 | {}, | |
156 | }; | |
157 | ||
158 | static struct pci_driver dw_spi_driver = { | |
159 | .name = DRIVER_NAME, | |
160 | .id_table = pci_ids, | |
161 | .probe = spi_pci_probe, | |
fd4a319b | 162 | .remove = spi_pci_remove, |
e24c7452 FT |
163 | .suspend = spi_suspend, |
164 | .resume = spi_resume, | |
165 | }; | |
166 | ||
8ebb35fd | 167 | module_pci_driver(dw_spi_driver); |
e24c7452 FT |
168 | |
169 | MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>"); | |
170 | MODULE_DESCRIPTION("PCI interface driver for DW SPI Core"); | |
171 | MODULE_LICENSE("GPL v2"); |