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Andres Salomonf71e1af2010-11-26 11:52:35 +01001/*
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
33enum 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
42static __devinitdata struct resource cs5535_mfd_resources[NR_BARS];
43
44static __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
77static 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
Andres Salomon816b4582010-11-30 13:54:39 -0800106 dev_info(&pdev->dev, "%zu devices registered.\n",
Andres Salomonf71e1af2010-11-26 11:52:35 +0100107 ARRAY_SIZE(cs5535_mfd_cells));
108
109 return 0;
110
111err_disable:
112 pci_disable_device(pdev);
113 return err;
114}
115
116static void __devexit cs5535_mfd_remove(struct pci_dev *pdev)
117{
118 mfd_remove_devices(&pdev->dev);
119 pci_disable_device(pdev);
120}
121
122static 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};
127MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);
128
129static 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
136static int __init cs5535_mfd_init(void)
137{
138 return pci_register_driver(&cs5535_mfd_drv);
139}
140
141static void __exit cs5535_mfd_exit(void)
142{
143 pci_unregister_driver(&cs5535_mfd_drv);
144}
145
146module_init(cs5535_mfd_init);
147module_exit(cs5535_mfd_exit);
148
149MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
150MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
151MODULE_LICENSE("GPL");