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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>
Andres Salomonf71e1af2010-11-26 11:52:35 +010026#include <linux/mfd/core.h>
27#include <linux/module.h>
28#include <linux/pci.h>
Andres Salomonfa1df692011-03-21 19:19:35 -070029#include <asm/olpc.h>
Andres Salomonf71e1af2010-11-26 11:52:35 +010030
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
Andres Salomon1310e6d2011-02-17 19:07:36 -080042static int cs5535_mfd_res_enable(struct platform_device *pdev)
43{
44 struct resource *res;
45
46 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
47 if (!res) {
48 dev_err(&pdev->dev, "can't fetch device resource info\n");
49 return -EIO;
50 }
51
52 if (!request_region(res->start, resource_size(res), DRV_NAME)) {
53 dev_err(&pdev->dev, "can't request region\n");
54 return -EIO;
55 }
56
57 return 0;
58}
59
60static int cs5535_mfd_res_disable(struct platform_device *pdev)
61{
62 struct resource *res;
63 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
64 if (!res) {
65 dev_err(&pdev->dev, "can't fetch device resource info\n");
66 return -EIO;
67 }
68
69 release_region(res->start, resource_size(res));
70 return 0;
71}
72
Bill Pembertona9e9ce42012-11-19 13:24:21 -050073static struct resource cs5535_mfd_resources[NR_BARS];
Andres Salomonf71e1af2010-11-26 11:52:35 +010074
Bill Pembertona9e9ce42012-11-19 13:24:21 -050075static struct mfd_cell cs5535_mfd_cells[] = {
Andres Salomonf71e1af2010-11-26 11:52:35 +010076 {
77 .id = SMB_BAR,
78 .name = "cs5535-smb",
79 .num_resources = 1,
80 .resources = &cs5535_mfd_resources[SMB_BAR],
81 },
82 {
83 .id = GPIO_BAR,
84 .name = "cs5535-gpio",
85 .num_resources = 1,
86 .resources = &cs5535_mfd_resources[GPIO_BAR],
87 },
88 {
89 .id = MFGPT_BAR,
90 .name = "cs5535-mfgpt",
91 .num_resources = 1,
92 .resources = &cs5535_mfd_resources[MFGPT_BAR],
93 },
94 {
95 .id = PMS_BAR,
96 .name = "cs5535-pms",
97 .num_resources = 1,
98 .resources = &cs5535_mfd_resources[PMS_BAR],
Andres Salomon1310e6d2011-02-17 19:07:36 -080099
100 .enable = cs5535_mfd_res_enable,
101 .disable = cs5535_mfd_res_disable,
Andres Salomonf71e1af2010-11-26 11:52:35 +0100102 },
103 {
104 .id = ACPI_BAR,
105 .name = "cs5535-acpi",
106 .num_resources = 1,
107 .resources = &cs5535_mfd_resources[ACPI_BAR],
Andres Salomon1310e6d2011-02-17 19:07:36 -0800108
109 .enable = cs5535_mfd_res_enable,
110 .disable = cs5535_mfd_res_disable,
Andres Salomonf71e1af2010-11-26 11:52:35 +0100111 },
112};
113
Andres Salomonfa1df692011-03-21 19:19:35 -0700114#ifdef CONFIG_OLPC
Bill Pembertonf791be42012-11-19 13:23:04 -0500115static void cs5535_clone_olpc_cells(void)
Andres Salomonfa1df692011-03-21 19:19:35 -0700116{
Daniel Drakeadfa4bd2011-03-22 13:50:39 -0700117 const char *acpi_clones[] = { "olpc-xo1-pm-acpi", "olpc-xo1-sci-acpi" };
Andres Salomonfa1df692011-03-21 19:19:35 -0700118
119 if (!machine_is_olpc())
120 return;
121
122 mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones));
Andres Salomonfa1df692011-03-21 19:19:35 -0700123}
124#else
125static void cs5535_clone_olpc_cells(void) { }
126#endif
127
Bill Pembertonf791be42012-11-19 13:23:04 -0500128static int cs5535_mfd_probe(struct pci_dev *pdev,
Andres Salomonf71e1af2010-11-26 11:52:35 +0100129 const struct pci_device_id *id)
130{
131 int err, i;
132
133 err = pci_enable_device(pdev);
134 if (err)
135 return err;
136
137 /* fill in IO range for each cell; subdrivers handle the region */
138 for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) {
139 int bar = cs5535_mfd_cells[i].id;
140 struct resource *r = &cs5535_mfd_resources[bar];
141
142 r->flags = IORESOURCE_IO;
143 r->start = pci_resource_start(pdev, bar);
144 r->end = pci_resource_end(pdev, bar);
145
146 /* id is used for temporarily storing BAR; unset it now */
147 cs5535_mfd_cells[i].id = 0;
148 }
149
150 err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells,
Mark Brown0848c942012-09-11 15:16:36 +0800151 ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
Andres Salomonf71e1af2010-11-26 11:52:35 +0100152 if (err) {
153 dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
154 goto err_disable;
155 }
Andres Salomonfa1df692011-03-21 19:19:35 -0700156 cs5535_clone_olpc_cells();
Andres Salomonf71e1af2010-11-26 11:52:35 +0100157
Andres Salomon816b4582010-11-30 13:54:39 -0800158 dev_info(&pdev->dev, "%zu devices registered.\n",
Andres Salomonf71e1af2010-11-26 11:52:35 +0100159 ARRAY_SIZE(cs5535_mfd_cells));
160
161 return 0;
162
163err_disable:
164 pci_disable_device(pdev);
165 return err;
166}
167
Bill Pemberton4740f732012-11-19 13:26:01 -0500168static void cs5535_mfd_remove(struct pci_dev *pdev)
Andres Salomonf71e1af2010-11-26 11:52:35 +0100169{
170 mfd_remove_devices(&pdev->dev);
171 pci_disable_device(pdev);
172}
173
Jingoo Han36fcd062013-12-03 08:15:39 +0900174static const struct pci_device_id cs5535_mfd_pci_tbl[] = {
Andres Salomonf71e1af2010-11-26 11:52:35 +0100175 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
176 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
177 { 0, }
178};
179MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);
180
Christian Gmeiner97e43c92011-12-13 21:30:04 +0100181static struct pci_driver cs5535_mfd_driver = {
Andres Salomonf71e1af2010-11-26 11:52:35 +0100182 .name = DRV_NAME,
183 .id_table = cs5535_mfd_pci_tbl,
184 .probe = cs5535_mfd_probe,
Bill Pemberton84449212012-11-19 13:20:24 -0500185 .remove = cs5535_mfd_remove,
Andres Salomonf71e1af2010-11-26 11:52:35 +0100186};
187
Axel Lin38a36f52012-04-03 09:09:19 +0800188module_pci_driver(cs5535_mfd_driver);
Andres Salomonf71e1af2010-11-26 11:52:35 +0100189
190MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
191MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
192MODULE_LICENSE("GPL");