diff options
author | Grant Likely <grant.likely@secretlab.ca> | 2011-06-06 03:16:30 -0400 |
---|---|---|
committer | Grant Likely <grant.likely@secretlab.ca> | 2011-06-06 03:16:30 -0400 |
commit | ca632f556697d45d67ed5cada7cedf3ddfe0db4b (patch) | |
tree | f393534b929abb32813ea5c495f1ac6d93a10d1d /drivers/spi/spi-dw-pci.c | |
parent | 8c99268431a117207a89be5167ecd69429fd4bda (diff) |
spi: reorganize drivers
Sort the SPI makefile and enforce the naming convention spi_*.c for
spi drivers.
This change also rolls the contents of atmel_spi.h into the .c file
since there is only one user of that particular include file.
v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be
be the predominant pattern for subsystem prefixes.
- Clean up filenames in Kconfig and header comment blocks
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/spi/spi-dw-pci.c')
-rw-r--r-- | drivers/spi/spi-dw-pci.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/spi/spi-dw-pci.c b/drivers/spi/spi-dw-pci.c new file mode 100644 index 000000000000..c5f37f03ac8b --- /dev/null +++ b/drivers/spi/spi-dw-pci.c | |||
@@ -0,0 +1,181 @@ | |||
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 | |||
25 | #include "spi-dw.h" | ||
26 | |||
27 | #define DRIVER_NAME "dw_spi_pci" | ||
28 | |||
29 | struct dw_spi_pci { | ||
30 | struct pci_dev *pdev; | ||
31 | struct dw_spi dws; | ||
32 | }; | ||
33 | |||
34 | static int __devinit spi_pci_probe(struct pci_dev *pdev, | ||
35 | const struct pci_device_id *ent) | ||
36 | { | ||
37 | struct dw_spi_pci *dwpci; | ||
38 | struct dw_spi *dws; | ||
39 | int pci_bar = 0; | ||
40 | int ret; | ||
41 | |||
42 | printk(KERN_INFO "DW: found PCI SPI controller(ID: %04x:%04x)\n", | ||
43 | pdev->vendor, pdev->device); | ||
44 | |||
45 | ret = pci_enable_device(pdev); | ||
46 | if (ret) | ||
47 | return ret; | ||
48 | |||
49 | dwpci = kzalloc(sizeof(struct dw_spi_pci), GFP_KERNEL); | ||
50 | if (!dwpci) { | ||
51 | ret = -ENOMEM; | ||
52 | goto err_disable; | ||
53 | } | ||
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 | dws->iolen = pci_resource_len(pdev, pci_bar); | ||
61 | |||
62 | ret = pci_request_region(pdev, pci_bar, dev_name(&pdev->dev)); | ||
63 | if (ret) | ||
64 | goto err_kfree; | ||
65 | |||
66 | dws->regs = ioremap_nocache((unsigned long)dws->paddr, | ||
67 | pci_resource_len(pdev, pci_bar)); | ||
68 | if (!dws->regs) { | ||
69 | ret = -ENOMEM; | ||
70 | goto err_release_reg; | ||
71 | } | ||
72 | |||
73 | dws->parent_dev = &pdev->dev; | ||
74 | dws->bus_num = 0; | ||
75 | dws->num_cs = 4; | ||
76 | dws->irq = pdev->irq; | ||
77 | |||
78 | /* | ||
79 | * Specific handling for Intel MID paltforms, like dma setup, | ||
80 | * clock rate, FIFO depth. | ||
81 | */ | ||
82 | if (pdev->device == 0x0800) { | ||
83 | ret = dw_spi_mid_init(dws); | ||
84 | if (ret) | ||
85 | goto err_unmap; | ||
86 | } | ||
87 | |||
88 | ret = dw_spi_add_host(dws); | ||
89 | if (ret) | ||
90 | goto err_unmap; | ||
91 | |||
92 | /* PCI hook and SPI hook use the same drv data */ | ||
93 | pci_set_drvdata(pdev, dwpci); | ||
94 | return 0; | ||
95 | |||
96 | err_unmap: | ||
97 | iounmap(dws->regs); | ||
98 | err_release_reg: | ||
99 | pci_release_region(pdev, pci_bar); | ||
100 | err_kfree: | ||
101 | kfree(dwpci); | ||
102 | err_disable: | ||
103 | pci_disable_device(pdev); | ||
104 | return ret; | ||
105 | } | ||
106 | |||
107 | static void __devexit spi_pci_remove(struct pci_dev *pdev) | ||
108 | { | ||
109 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | ||
110 | |||
111 | pci_set_drvdata(pdev, NULL); | ||
112 | dw_spi_remove_host(&dwpci->dws); | ||
113 | iounmap(dwpci->dws.regs); | ||
114 | pci_release_region(pdev, 0); | ||
115 | kfree(dwpci); | ||
116 | pci_disable_device(pdev); | ||
117 | } | ||
118 | |||
119 | #ifdef CONFIG_PM | ||
120 | static int spi_suspend(struct pci_dev *pdev, pm_message_t state) | ||
121 | { | ||
122 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | ||
123 | int ret; | ||
124 | |||
125 | ret = dw_spi_suspend_host(&dwpci->dws); | ||
126 | if (ret) | ||
127 | return ret; | ||
128 | pci_save_state(pdev); | ||
129 | pci_disable_device(pdev); | ||
130 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | ||
131 | return ret; | ||
132 | } | ||
133 | |||
134 | static int spi_resume(struct pci_dev *pdev) | ||
135 | { | ||
136 | struct dw_spi_pci *dwpci = pci_get_drvdata(pdev); | ||
137 | int ret; | ||
138 | |||
139 | pci_set_power_state(pdev, PCI_D0); | ||
140 | pci_restore_state(pdev); | ||
141 | ret = pci_enable_device(pdev); | ||
142 | if (ret) | ||
143 | return ret; | ||
144 | return dw_spi_resume_host(&dwpci->dws); | ||
145 | } | ||
146 | #else | ||
147 | #define spi_suspend NULL | ||
148 | #define spi_resume NULL | ||
149 | #endif | ||
150 | |||
151 | static const struct pci_device_id pci_ids[] __devinitdata = { | ||
152 | /* Intel MID platform SPI controller 0 */ | ||
153 | { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0800) }, | ||
154 | {}, | ||
155 | }; | ||
156 | |||
157 | static struct pci_driver dw_spi_driver = { | ||
158 | .name = DRIVER_NAME, | ||
159 | .id_table = pci_ids, | ||
160 | .probe = spi_pci_probe, | ||
161 | .remove = __devexit_p(spi_pci_remove), | ||
162 | .suspend = spi_suspend, | ||
163 | .resume = spi_resume, | ||
164 | }; | ||
165 | |||
166 | static int __init mrst_spi_init(void) | ||
167 | { | ||
168 | return pci_register_driver(&dw_spi_driver); | ||
169 | } | ||
170 | |||
171 | static void __exit mrst_spi_exit(void) | ||
172 | { | ||
173 | pci_unregister_driver(&dw_spi_driver); | ||
174 | } | ||
175 | |||
176 | module_init(mrst_spi_init); | ||
177 | module_exit(mrst_spi_exit); | ||
178 | |||
179 | MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>"); | ||
180 | MODULE_DESCRIPTION("PCI interface driver for DW SPI Core"); | ||
181 | MODULE_LICENSE("GPL v2"); | ||