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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> | |
fa1df691 | 30 | #include <asm/olpc.h> |
f71e1afd AS |
31 | |
32 | #define DRV_NAME "cs5535-mfd" | |
33 | ||
34 | enum cs5535_mfd_bars { | |
35 | SMB_BAR = 0, | |
36 | GPIO_BAR = 1, | |
37 | MFGPT_BAR = 2, | |
38 | PMS_BAR = 4, | |
39 | ACPI_BAR = 5, | |
40 | NR_BARS, | |
41 | }; | |
42 | ||
1310e6d6 AS |
43 | static int cs5535_mfd_res_enable(struct platform_device *pdev) |
44 | { | |
45 | struct resource *res; | |
46 | ||
47 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
48 | if (!res) { | |
49 | dev_err(&pdev->dev, "can't fetch device resource info\n"); | |
50 | return -EIO; | |
51 | } | |
52 | ||
53 | if (!request_region(res->start, resource_size(res), DRV_NAME)) { | |
54 | dev_err(&pdev->dev, "can't request region\n"); | |
55 | return -EIO; | |
56 | } | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
61 | static int cs5535_mfd_res_disable(struct platform_device *pdev) | |
62 | { | |
63 | struct resource *res; | |
64 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
65 | if (!res) { | |
66 | dev_err(&pdev->dev, "can't fetch device resource info\n"); | |
67 | return -EIO; | |
68 | } | |
69 | ||
70 | release_region(res->start, resource_size(res)); | |
71 | return 0; | |
72 | } | |
73 | ||
a9e9ce4c | 74 | static struct resource cs5535_mfd_resources[NR_BARS]; |
f71e1afd | 75 | |
a9e9ce4c | 76 | static struct mfd_cell cs5535_mfd_cells[] = { |
f71e1afd AS |
77 | { |
78 | .id = SMB_BAR, | |
79 | .name = "cs5535-smb", | |
80 | .num_resources = 1, | |
81 | .resources = &cs5535_mfd_resources[SMB_BAR], | |
82 | }, | |
83 | { | |
84 | .id = GPIO_BAR, | |
85 | .name = "cs5535-gpio", | |
86 | .num_resources = 1, | |
87 | .resources = &cs5535_mfd_resources[GPIO_BAR], | |
88 | }, | |
89 | { | |
90 | .id = MFGPT_BAR, | |
91 | .name = "cs5535-mfgpt", | |
92 | .num_resources = 1, | |
93 | .resources = &cs5535_mfd_resources[MFGPT_BAR], | |
94 | }, | |
95 | { | |
96 | .id = PMS_BAR, | |
97 | .name = "cs5535-pms", | |
98 | .num_resources = 1, | |
99 | .resources = &cs5535_mfd_resources[PMS_BAR], | |
1310e6d6 AS |
100 | |
101 | .enable = cs5535_mfd_res_enable, | |
102 | .disable = cs5535_mfd_res_disable, | |
f71e1afd AS |
103 | }, |
104 | { | |
105 | .id = ACPI_BAR, | |
106 | .name = "cs5535-acpi", | |
107 | .num_resources = 1, | |
108 | .resources = &cs5535_mfd_resources[ACPI_BAR], | |
1310e6d6 AS |
109 | |
110 | .enable = cs5535_mfd_res_enable, | |
111 | .disable = cs5535_mfd_res_disable, | |
f71e1afd AS |
112 | }, |
113 | }; | |
114 | ||
fa1df691 | 115 | #ifdef CONFIG_OLPC |
f791be49 | 116 | static void cs5535_clone_olpc_cells(void) |
fa1df691 | 117 | { |
adfa4bd4 | 118 | const char *acpi_clones[] = { "olpc-xo1-pm-acpi", "olpc-xo1-sci-acpi" }; |
fa1df691 AS |
119 | |
120 | if (!machine_is_olpc()) | |
121 | return; | |
122 | ||
123 | mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones)); | |
fa1df691 AS |
124 | } |
125 | #else | |
126 | static void cs5535_clone_olpc_cells(void) { } | |
127 | #endif | |
128 | ||
f791be49 | 129 | static int cs5535_mfd_probe(struct pci_dev *pdev, |
f71e1afd AS |
130 | const struct pci_device_id *id) |
131 | { | |
132 | int err, i; | |
133 | ||
134 | err = pci_enable_device(pdev); | |
135 | if (err) | |
136 | return err; | |
137 | ||
138 | /* fill in IO range for each cell; subdrivers handle the region */ | |
139 | for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) { | |
140 | int bar = cs5535_mfd_cells[i].id; | |
141 | struct resource *r = &cs5535_mfd_resources[bar]; | |
142 | ||
143 | r->flags = IORESOURCE_IO; | |
144 | r->start = pci_resource_start(pdev, bar); | |
145 | r->end = pci_resource_end(pdev, bar); | |
146 | ||
147 | /* id is used for temporarily storing BAR; unset it now */ | |
148 | cs5535_mfd_cells[i].id = 0; | |
149 | } | |
150 | ||
151 | err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells, | |
0848c94f | 152 | ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL); |
f71e1afd AS |
153 | if (err) { |
154 | dev_err(&pdev->dev, "MFD add devices failed: %d\n", err); | |
155 | goto err_disable; | |
156 | } | |
fa1df691 | 157 | cs5535_clone_olpc_cells(); |
f71e1afd | 158 | |
816b4580 | 159 | dev_info(&pdev->dev, "%zu devices registered.\n", |
f71e1afd AS |
160 | ARRAY_SIZE(cs5535_mfd_cells)); |
161 | ||
162 | return 0; | |
163 | ||
164 | err_disable: | |
165 | pci_disable_device(pdev); | |
166 | return err; | |
167 | } | |
168 | ||
4740f73f | 169 | static void cs5535_mfd_remove(struct pci_dev *pdev) |
f71e1afd AS |
170 | { |
171 | mfd_remove_devices(&pdev->dev); | |
172 | pci_disable_device(pdev); | |
173 | } | |
174 | ||
61485c63 | 175 | static DEFINE_PCI_DEVICE_TABLE(cs5535_mfd_pci_tbl) = { |
f71e1afd AS |
176 | { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) }, |
177 | { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) }, | |
178 | { 0, } | |
179 | }; | |
180 | MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); | |
181 | ||
97e43c98 | 182 | static struct pci_driver cs5535_mfd_driver = { |
f71e1afd AS |
183 | .name = DRV_NAME, |
184 | .id_table = cs5535_mfd_pci_tbl, | |
185 | .probe = cs5535_mfd_probe, | |
84449216 | 186 | .remove = cs5535_mfd_remove, |
f71e1afd AS |
187 | }; |
188 | ||
38a36f5a | 189 | module_pci_driver(cs5535_mfd_driver); |
f71e1afd AS |
190 | |
191 | MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); | |
192 | MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); | |
193 | MODULE_LICENSE("GPL"); |