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> 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 42 static __devinitdata struct resource cs5535_mfd_resources[NR_BARS]; 43 44 static __devinitdata struct mfd_cell cs5535_mfd_cells[] = { 45 { 46 .id = SMB_BAR, 47 .name = "cs5535-smb", 48 .num_resources = 1, 49 .resources = &cs5535_mfd_resources[SMB_BAR], 50 }, 51 { 52 .id = GPIO_BAR, 53 .name = "cs5535-gpio", 54 .num_resources = 1, 55 .resources = &cs5535_mfd_resources[GPIO_BAR], 56 }, 57 { 58 .id = MFGPT_BAR, 59 .name = "cs5535-mfgpt", 60 .num_resources = 1, 61 .resources = &cs5535_mfd_resources[MFGPT_BAR], 62 }, 63 { 64 .id = PMS_BAR, 65 .name = "cs5535-pms", 66 .num_resources = 1, 67 .resources = &cs5535_mfd_resources[PMS_BAR], 68 }, 69 { 70 .id = ACPI_BAR, 71 .name = "cs5535-acpi", 72 .num_resources = 1, 73 .resources = &cs5535_mfd_resources[ACPI_BAR], 74 }, 75 }; 76 77 static int __devinit cs5535_mfd_probe(struct pci_dev *pdev, 78 const struct pci_device_id *id) 79 { 80 int err, i; 81 82 err = pci_enable_device(pdev); 83 if (err) 84 return err; 85 86 /* fill in IO range for each cell; subdrivers handle the region */ 87 for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) { 88 int bar = cs5535_mfd_cells[i].id; 89 struct resource *r = &cs5535_mfd_resources[bar]; 90 91 r->flags = IORESOURCE_IO; 92 r->start = pci_resource_start(pdev, bar); 93 r->end = pci_resource_end(pdev, bar); 94 95 /* id is used for temporarily storing BAR; unset it now */ 96 cs5535_mfd_cells[i].id = 0; 97 } 98 99 err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells, 100 ARRAY_SIZE(cs5535_mfd_cells), NULL, 0); 101 if (err) { 102 dev_err(&pdev->dev, "MFD add devices failed: %d\n", err); 103 goto err_disable; 104 } 105 106 dev_info(&pdev->dev, "%zu devices registered.\n", 107 ARRAY_SIZE(cs5535_mfd_cells)); 108 109 return 0; 110 111 err_disable: 112 pci_disable_device(pdev); 113 return err; 114 } 115 116 static void __devexit cs5535_mfd_remove(struct pci_dev *pdev) 117 { 118 mfd_remove_devices(&pdev->dev); 119 pci_disable_device(pdev); 120 } 121 122 static struct pci_device_id cs5535_mfd_pci_tbl[] = { 123 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) }, 124 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) }, 125 { 0, } 126 }; 127 MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); 128 129 static struct pci_driver cs5535_mfd_drv = { 130 .name = DRV_NAME, 131 .id_table = cs5535_mfd_pci_tbl, 132 .probe = cs5535_mfd_probe, 133 .remove = __devexit_p(cs5535_mfd_remove), 134 }; 135 136 static int __init cs5535_mfd_init(void) 137 { 138 return pci_register_driver(&cs5535_mfd_drv); 139 } 140 141 static void __exit cs5535_mfd_exit(void) 142 { 143 pci_unregister_driver(&cs5535_mfd_drv); 144 } 145 146 module_init(cs5535_mfd_init); 147 module_exit(cs5535_mfd_exit); 148 149 MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); 150 MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); 151 MODULE_LICENSE("GPL"); 152