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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> | |
f71e1afd AS |
26 | #include <linux/mfd/core.h> |
27 | #include <linux/module.h> | |
28 | #include <linux/pci.h> | |
fa1df691 | 29 | #include <asm/olpc.h> |
f71e1afd AS |
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 | ||
1310e6d6 AS |
42 | static 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 | ||
60 | static 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 | ||
a9e9ce4c | 73 | static struct resource cs5535_mfd_resources[NR_BARS]; |
f71e1afd | 74 | |
a9e9ce4c | 75 | static struct mfd_cell cs5535_mfd_cells[] = { |
f71e1afd AS |
76 | { |
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], | |
1310e6d6 AS |
99 | |
100 | .enable = cs5535_mfd_res_enable, | |
101 | .disable = cs5535_mfd_res_disable, | |
f71e1afd AS |
102 | }, |
103 | { | |
104 | .id = ACPI_BAR, | |
105 | .name = "cs5535-acpi", | |
106 | .num_resources = 1, | |
107 | .resources = &cs5535_mfd_resources[ACPI_BAR], | |
1310e6d6 AS |
108 | |
109 | .enable = cs5535_mfd_res_enable, | |
110 | .disable = cs5535_mfd_res_disable, | |
f71e1afd AS |
111 | }, |
112 | }; | |
113 | ||
fa1df691 | 114 | #ifdef CONFIG_OLPC |
f791be49 | 115 | static void cs5535_clone_olpc_cells(void) |
fa1df691 | 116 | { |
adfa4bd4 | 117 | const char *acpi_clones[] = { "olpc-xo1-pm-acpi", "olpc-xo1-sci-acpi" }; |
fa1df691 AS |
118 | |
119 | if (!machine_is_olpc()) | |
120 | return; | |
121 | ||
122 | mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones)); | |
fa1df691 AS |
123 | } |
124 | #else | |
125 | static void cs5535_clone_olpc_cells(void) { } | |
126 | #endif | |
127 | ||
f791be49 | 128 | static int cs5535_mfd_probe(struct pci_dev *pdev, |
f71e1afd AS |
129 | 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, | |
0848c94f | 151 | ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL); |
f71e1afd AS |
152 | if (err) { |
153 | dev_err(&pdev->dev, "MFD add devices failed: %d\n", err); | |
154 | goto err_disable; | |
155 | } | |
fa1df691 | 156 | cs5535_clone_olpc_cells(); |
f71e1afd | 157 | |
816b4580 | 158 | dev_info(&pdev->dev, "%zu devices registered.\n", |
f71e1afd AS |
159 | ARRAY_SIZE(cs5535_mfd_cells)); |
160 | ||
161 | return 0; | |
162 | ||
163 | err_disable: | |
164 | pci_disable_device(pdev); | |
165 | return err; | |
166 | } | |
167 | ||
4740f73f | 168 | static void cs5535_mfd_remove(struct pci_dev *pdev) |
f71e1afd AS |
169 | { |
170 | mfd_remove_devices(&pdev->dev); | |
171 | pci_disable_device(pdev); | |
172 | } | |
173 | ||
36fcd06c | 174 | static const struct pci_device_id cs5535_mfd_pci_tbl[] = { |
f71e1afd AS |
175 | { 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 | }; | |
179 | MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); | |
180 | ||
97e43c98 | 181 | static struct pci_driver cs5535_mfd_driver = { |
f71e1afd AS |
182 | .name = DRV_NAME, |
183 | .id_table = cs5535_mfd_pci_tbl, | |
184 | .probe = cs5535_mfd_probe, | |
84449216 | 185 | .remove = cs5535_mfd_remove, |
f71e1afd AS |
186 | }; |
187 | ||
38a36f5a | 188 | module_pci_driver(cs5535_mfd_driver); |
f71e1afd AS |
189 | |
190 | MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); | |
191 | MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); | |
192 | MODULE_LICENSE("GPL"); |