Blame view
drivers/mfd/cs5535-mfd.c
4.7 KB
f71e1afdd
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 |
/* * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges * * The CS5535 and CS5536 has an ISA bridge on the PCI bus that is * used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has * an IO range that's specified in a single BAR. The BAR order is * hardcoded in the CS553x specifications. * * Copyright (c) 2010 Andres Salomon <dilinger@queued.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/kernel.h> |
f71e1afdd
|
26 27 28 |
#include <linux/mfd/core.h> #include <linux/module.h> #include <linux/pci.h> |
fa1df6916
|
29 |
#include <asm/olpc.h> |
f71e1afdd
|
30 31 32 33 34 35 36 37 38 39 40 |
#define DRV_NAME "cs5535-mfd" enum cs5535_mfd_bars { SMB_BAR = 0, GPIO_BAR = 1, MFGPT_BAR = 2, PMS_BAR = 4, ACPI_BAR = 5, NR_BARS, }; |
1310e6d63
|
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 |
static int cs5535_mfd_res_enable(struct platform_device *pdev) { struct resource *res; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (!res) { dev_err(&pdev->dev, "can't fetch device resource info "); return -EIO; } if (!request_region(res->start, resource_size(res), DRV_NAME)) { dev_err(&pdev->dev, "can't request region "); return -EIO; } return 0; } static int cs5535_mfd_res_disable(struct platform_device *pdev) { struct resource *res; res = platform_get_resource(pdev, IORESOURCE_IO, 0); if (!res) { dev_err(&pdev->dev, "can't fetch device resource info "); return -EIO; } release_region(res->start, resource_size(res)); return 0; } |
a9e9ce4c4
|
74 |
static struct resource cs5535_mfd_resources[NR_BARS]; |
f71e1afdd
|
75 |
|
a9e9ce4c4
|
76 |
static struct mfd_cell cs5535_mfd_cells[] = { |
f71e1afdd
|
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 |
{ .id = SMB_BAR, .name = "cs5535-smb", .num_resources = 1, .resources = &cs5535_mfd_resources[SMB_BAR], }, { .id = GPIO_BAR, .name = "cs5535-gpio", .num_resources = 1, .resources = &cs5535_mfd_resources[GPIO_BAR], }, { .id = MFGPT_BAR, .name = "cs5535-mfgpt", .num_resources = 1, .resources = &cs5535_mfd_resources[MFGPT_BAR], }, { .id = PMS_BAR, .name = "cs5535-pms", .num_resources = 1, .resources = &cs5535_mfd_resources[PMS_BAR], |
1310e6d63
|
100 101 102 |
.enable = cs5535_mfd_res_enable, .disable = cs5535_mfd_res_disable, |
f71e1afdd
|
103 104 105 106 107 108 |
}, { .id = ACPI_BAR, .name = "cs5535-acpi", .num_resources = 1, .resources = &cs5535_mfd_resources[ACPI_BAR], |
1310e6d63
|
109 110 111 |
.enable = cs5535_mfd_res_enable, .disable = cs5535_mfd_res_disable, |
f71e1afdd
|
112 113 |
}, }; |
fa1df6916
|
114 |
#ifdef CONFIG_OLPC |
f791be492
|
115 |
static void cs5535_clone_olpc_cells(void) |
fa1df6916
|
116 |
{ |
adfa4bd4a
|
117 |
const char *acpi_clones[] = { "olpc-xo1-pm-acpi", "olpc-xo1-sci-acpi" }; |
fa1df6916
|
118 119 120 121 122 |
if (!machine_is_olpc()) return; mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones)); |
fa1df6916
|
123 124 125 126 |
} #else static void cs5535_clone_olpc_cells(void) { } #endif |
f791be492
|
127 |
static int cs5535_mfd_probe(struct pci_dev *pdev, |
f71e1afdd
|
128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 |
const struct pci_device_id *id) { int err, i; err = pci_enable_device(pdev); if (err) return err; /* fill in IO range for each cell; subdrivers handle the region */ for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) { int bar = cs5535_mfd_cells[i].id; struct resource *r = &cs5535_mfd_resources[bar]; r->flags = IORESOURCE_IO; r->start = pci_resource_start(pdev, bar); r->end = pci_resource_end(pdev, bar); /* id is used for temporarily storing BAR; unset it now */ cs5535_mfd_cells[i].id = 0; } err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells, |
0848c94fb
|
150 |
ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL); |
f71e1afdd
|
151 152 153 154 155 |
if (err) { dev_err(&pdev->dev, "MFD add devices failed: %d ", err); goto err_disable; } |
fa1df6916
|
156 |
cs5535_clone_olpc_cells(); |
f71e1afdd
|
157 |
|
816b4580c
|
158 159 |
dev_info(&pdev->dev, "%zu devices registered. ", |
f71e1afdd
|
160 161 162 163 164 165 166 167 |
ARRAY_SIZE(cs5535_mfd_cells)); return 0; err_disable: pci_disable_device(pdev); return err; } |
4740f73fe
|
168 |
static void cs5535_mfd_remove(struct pci_dev *pdev) |
f71e1afdd
|
169 170 171 172 |
{ mfd_remove_devices(&pdev->dev); pci_disable_device(pdev); } |
36fcd06c4
|
173 |
static const struct pci_device_id cs5535_mfd_pci_tbl[] = { |
f71e1afdd
|
174 175 176 177 178 |
{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) }, { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) }, { 0, } }; MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); |
97e43c983
|
179 |
static struct pci_driver cs5535_mfd_driver = { |
f71e1afdd
|
180 181 182 |
.name = DRV_NAME, .id_table = cs5535_mfd_pci_tbl, .probe = cs5535_mfd_probe, |
84449216b
|
183 |
.remove = cs5535_mfd_remove, |
f71e1afdd
|
184 |
}; |
38a36f5a6
|
185 |
module_pci_driver(cs5535_mfd_driver); |
f71e1afdd
|
186 187 188 189 |
MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); MODULE_LICENSE("GPL"); |