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f71e1afd AS |
1 | /* |
2 | * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges | |
3 | * | |
4 | * The CS5535 and CS5536 has an ISA bridge on the PCI bus that is | |
5 | * used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has | |
6 | * an IO range that's specified in a single BAR. The BAR order is | |
7 | * hardcoded in the CS553x specifications. | |
8 | * | |
9 | * Copyright (c) 2010 Andres Salomon <dilinger@queued.net> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/mfd/core.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/pci.h> | |
30 | ||
31 | #define DRV_NAME "cs5535-mfd" | |
32 | ||
33 | enum cs5535_mfd_bars { | |
34 | SMB_BAR = 0, | |
35 | GPIO_BAR = 1, | |
36 | MFGPT_BAR = 2, | |
37 | PMS_BAR = 4, | |
38 | ACPI_BAR = 5, | |
39 | NR_BARS, | |
40 | }; | |
41 | ||
42 | static __devinitdata struct resource cs5535_mfd_resources[NR_BARS]; | |
43 | ||
44 | static __devinitdata struct mfd_cell cs5535_mfd_cells[] = { | |
45 | { | |
46 | .id = SMB_BAR, | |
47 | .name = "cs5535-smb", | |
48 | .num_resources = 1, | |
49 | .resources = &cs5535_mfd_resources[SMB_BAR], | |
50 | }, | |
51 | { | |
52 | .id = GPIO_BAR, | |
53 | .name = "cs5535-gpio", | |
54 | .num_resources = 1, | |
55 | .resources = &cs5535_mfd_resources[GPIO_BAR], | |
56 | }, | |
57 | { | |
58 | .id = MFGPT_BAR, | |
59 | .name = "cs5535-mfgpt", | |
60 | .num_resources = 1, | |
61 | .resources = &cs5535_mfd_resources[MFGPT_BAR], | |
62 | }, | |
63 | { | |
64 | .id = PMS_BAR, | |
65 | .name = "cs5535-pms", | |
66 | .num_resources = 1, | |
67 | .resources = &cs5535_mfd_resources[PMS_BAR], | |
68 | }, | |
69 | { | |
70 | .id = ACPI_BAR, | |
71 | .name = "cs5535-acpi", | |
72 | .num_resources = 1, | |
73 | .resources = &cs5535_mfd_resources[ACPI_BAR], | |
74 | }, | |
75 | }; | |
76 | ||
77 | static int __devinit cs5535_mfd_probe(struct pci_dev *pdev, | |
78 | const struct pci_device_id *id) | |
79 | { | |
80 | int err, i; | |
81 | ||
82 | err = pci_enable_device(pdev); | |
83 | if (err) | |
84 | return err; | |
85 | ||
86 | /* fill in IO range for each cell; subdrivers handle the region */ | |
87 | for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) { | |
88 | int bar = cs5535_mfd_cells[i].id; | |
89 | struct resource *r = &cs5535_mfd_resources[bar]; | |
90 | ||
91 | r->flags = IORESOURCE_IO; | |
92 | r->start = pci_resource_start(pdev, bar); | |
93 | r->end = pci_resource_end(pdev, bar); | |
94 | ||
95 | /* id is used for temporarily storing BAR; unset it now */ | |
96 | cs5535_mfd_cells[i].id = 0; | |
97 | } | |
98 | ||
99 | err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells, | |
100 | ARRAY_SIZE(cs5535_mfd_cells), NULL, 0); | |
101 | if (err) { | |
102 | dev_err(&pdev->dev, "MFD add devices failed: %d\n", err); | |
103 | goto err_disable; | |
104 | } | |
105 | ||
816b4580 | 106 | dev_info(&pdev->dev, "%zu devices registered.\n", |
f71e1afd AS |
107 | ARRAY_SIZE(cs5535_mfd_cells)); |
108 | ||
109 | return 0; | |
110 | ||
111 | err_disable: | |
112 | pci_disable_device(pdev); | |
113 | return err; | |
114 | } | |
115 | ||
116 | static void __devexit cs5535_mfd_remove(struct pci_dev *pdev) | |
117 | { | |
118 | mfd_remove_devices(&pdev->dev); | |
119 | pci_disable_device(pdev); | |
120 | } | |
121 | ||
122 | static struct pci_device_id cs5535_mfd_pci_tbl[] = { | |
123 | { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) }, | |
124 | { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) }, | |
125 | { 0, } | |
126 | }; | |
127 | MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); | |
128 | ||
129 | static struct pci_driver cs5535_mfd_drv = { | |
130 | .name = DRV_NAME, | |
131 | .id_table = cs5535_mfd_pci_tbl, | |
132 | .probe = cs5535_mfd_probe, | |
133 | .remove = __devexit_p(cs5535_mfd_remove), | |
134 | }; | |
135 | ||
136 | static int __init cs5535_mfd_init(void) | |
137 | { | |
138 | return pci_register_driver(&cs5535_mfd_drv); | |
139 | } | |
140 | ||
141 | static void __exit cs5535_mfd_exit(void) | |
142 | { | |
143 | pci_unregister_driver(&cs5535_mfd_drv); | |
144 | } | |
145 | ||
146 | module_init(cs5535_mfd_init); | |
147 | module_exit(cs5535_mfd_exit); | |
148 | ||
149 | MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); | |
150 | MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); | |
151 | MODULE_LICENSE("GPL"); |