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82c29810 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f71e1afd AS |
2 | /* |
3 | * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges | |
4 | * | |
5 | * The CS5535 and CS5536 has an ISA bridge on the PCI bus that is | |
6 | * used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has | |
7 | * an IO range that's specified in a single BAR. The BAR order is | |
8 | * hardcoded in the CS553x specifications. | |
9 | * | |
10 | * Copyright (c) 2010 Andres Salomon <dilinger@queued.net> | |
f71e1afd AS |
11 | */ |
12 | ||
13 | #include <linux/kernel.h> | |
f71e1afd AS |
14 | #include <linux/mfd/core.h> |
15 | #include <linux/module.h> | |
16 | #include <linux/pci.h> | |
fa1df691 | 17 | #include <asm/olpc.h> |
f71e1afd AS |
18 | |
19 | #define DRV_NAME "cs5535-mfd" | |
20 | ||
21 | enum cs5535_mfd_bars { | |
22 | SMB_BAR = 0, | |
23 | GPIO_BAR = 1, | |
24 | MFGPT_BAR = 2, | |
25 | PMS_BAR = 4, | |
26 | ACPI_BAR = 5, | |
27 | NR_BARS, | |
28 | }; | |
29 | ||
1310e6d6 AS |
30 | static int cs5535_mfd_res_enable(struct platform_device *pdev) |
31 | { | |
32 | struct resource *res; | |
33 | ||
34 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); | |
35 | if (!res) { | |
36 | dev_err(&pdev->dev, "can't fetch device resource info\n"); | |
37 | return -EIO; | |
38 | } | |
39 | ||
40 | if (!request_region(res->start, resource_size(res), DRV_NAME)) { | |
41 | dev_err(&pdev->dev, "can't request region\n"); | |
42 | return -EIO; | |
43 | } | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | static int cs5535_mfd_res_disable(struct platform_device *pdev) | |
49 | { | |
50 | struct resource *res; | |
740c1989 | 51 | |
1310e6d6 AS |
52 | res = platform_get_resource(pdev, IORESOURCE_IO, 0); |
53 | if (!res) { | |
54 | dev_err(&pdev->dev, "can't fetch device resource info\n"); | |
55 | return -EIO; | |
56 | } | |
57 | ||
58 | release_region(res->start, resource_size(res)); | |
59 | return 0; | |
60 | } | |
61 | ||
a9e9ce4c | 62 | static struct resource cs5535_mfd_resources[NR_BARS]; |
f71e1afd | 63 | |
a9e9ce4c | 64 | static struct mfd_cell cs5535_mfd_cells[] = { |
f71e1afd AS |
65 | { |
66 | .id = SMB_BAR, | |
67 | .name = "cs5535-smb", | |
68 | .num_resources = 1, | |
69 | .resources = &cs5535_mfd_resources[SMB_BAR], | |
70 | }, | |
71 | { | |
72 | .id = GPIO_BAR, | |
73 | .name = "cs5535-gpio", | |
74 | .num_resources = 1, | |
75 | .resources = &cs5535_mfd_resources[GPIO_BAR], | |
76 | }, | |
77 | { | |
78 | .id = MFGPT_BAR, | |
79 | .name = "cs5535-mfgpt", | |
80 | .num_resources = 1, | |
81 | .resources = &cs5535_mfd_resources[MFGPT_BAR], | |
82 | }, | |
83 | { | |
84 | .id = PMS_BAR, | |
85 | .name = "cs5535-pms", | |
86 | .num_resources = 1, | |
87 | .resources = &cs5535_mfd_resources[PMS_BAR], | |
1310e6d6 AS |
88 | |
89 | .enable = cs5535_mfd_res_enable, | |
90 | .disable = cs5535_mfd_res_disable, | |
f71e1afd AS |
91 | }, |
92 | { | |
93 | .id = ACPI_BAR, | |
94 | .name = "cs5535-acpi", | |
95 | .num_resources = 1, | |
96 | .resources = &cs5535_mfd_resources[ACPI_BAR], | |
1310e6d6 AS |
97 | |
98 | .enable = cs5535_mfd_res_enable, | |
99 | .disable = cs5535_mfd_res_disable, | |
f71e1afd AS |
100 | }, |
101 | }; | |
102 | ||
fa1df691 | 103 | #ifdef CONFIG_OLPC |
f791be49 | 104 | static void cs5535_clone_olpc_cells(void) |
fa1df691 | 105 | { |
740c1989 LJ |
106 | static const char *acpi_clones[] = { |
107 | "olpc-xo1-pm-acpi", | |
108 | "olpc-xo1-sci-acpi" | |
109 | }; | |
fa1df691 AS |
110 | |
111 | if (!machine_is_olpc()) | |
112 | return; | |
113 | ||
114 | mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones)); | |
fa1df691 AS |
115 | } |
116 | #else | |
117 | static void cs5535_clone_olpc_cells(void) { } | |
118 | #endif | |
119 | ||
f791be49 | 120 | static int cs5535_mfd_probe(struct pci_dev *pdev, |
f71e1afd AS |
121 | const struct pci_device_id *id) |
122 | { | |
123 | int err, i; | |
124 | ||
125 | err = pci_enable_device(pdev); | |
126 | if (err) | |
127 | return err; | |
128 | ||
129 | /* fill in IO range for each cell; subdrivers handle the region */ | |
130 | for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) { | |
131 | int bar = cs5535_mfd_cells[i].id; | |
132 | struct resource *r = &cs5535_mfd_resources[bar]; | |
133 | ||
134 | r->flags = IORESOURCE_IO; | |
135 | r->start = pci_resource_start(pdev, bar); | |
136 | r->end = pci_resource_end(pdev, bar); | |
137 | ||
138 | /* id is used for temporarily storing BAR; unset it now */ | |
139 | cs5535_mfd_cells[i].id = 0; | |
140 | } | |
141 | ||
142 | err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells, | |
0848c94f | 143 | ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL); |
f71e1afd AS |
144 | if (err) { |
145 | dev_err(&pdev->dev, "MFD add devices failed: %d\n", err); | |
146 | goto err_disable; | |
147 | } | |
fa1df691 | 148 | cs5535_clone_olpc_cells(); |
f71e1afd | 149 | |
816b4580 | 150 | dev_info(&pdev->dev, "%zu devices registered.\n", |
f71e1afd AS |
151 | ARRAY_SIZE(cs5535_mfd_cells)); |
152 | ||
153 | return 0; | |
154 | ||
155 | err_disable: | |
156 | pci_disable_device(pdev); | |
157 | return err; | |
158 | } | |
159 | ||
4740f73f | 160 | static void cs5535_mfd_remove(struct pci_dev *pdev) |
f71e1afd AS |
161 | { |
162 | mfd_remove_devices(&pdev->dev); | |
163 | pci_disable_device(pdev); | |
164 | } | |
165 | ||
36fcd06c | 166 | static const struct pci_device_id cs5535_mfd_pci_tbl[] = { |
f71e1afd AS |
167 | { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) }, |
168 | { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) }, | |
169 | { 0, } | |
170 | }; | |
171 | MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); | |
172 | ||
97e43c98 | 173 | static struct pci_driver cs5535_mfd_driver = { |
f71e1afd AS |
174 | .name = DRV_NAME, |
175 | .id_table = cs5535_mfd_pci_tbl, | |
176 | .probe = cs5535_mfd_probe, | |
84449216 | 177 | .remove = cs5535_mfd_remove, |
f71e1afd AS |
178 | }; |
179 | ||
38a36f5a | 180 | module_pci_driver(cs5535_mfd_driver); |
f71e1afd AS |
181 | |
182 | MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); | |
183 | MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); | |
184 | MODULE_LICENSE("GPL"); |