1f71e1afdSAndres Salomon /* 2f71e1afdSAndres Salomon * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges 3f71e1afdSAndres Salomon * 4f71e1afdSAndres Salomon * The CS5535 and CS5536 has an ISA bridge on the PCI bus that is 5f71e1afdSAndres Salomon * used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has 6f71e1afdSAndres Salomon * an IO range that's specified in a single BAR. The BAR order is 7f71e1afdSAndres Salomon * hardcoded in the CS553x specifications. 8f71e1afdSAndres Salomon * 9f71e1afdSAndres Salomon * Copyright (c) 2010 Andres Salomon <dilinger@queued.net> 10f71e1afdSAndres Salomon * 11f71e1afdSAndres Salomon * This program is free software; you can redistribute it and/or modify 12f71e1afdSAndres Salomon * it under the terms of the GNU General Public License version 2 as 13f71e1afdSAndres Salomon * published by the Free Software Foundation. 14f71e1afdSAndres Salomon * 15f71e1afdSAndres Salomon * This program is distributed in the hope that it will be useful, 16f71e1afdSAndres Salomon * but WITHOUT ANY WARRANTY; without even the implied warranty of 17f71e1afdSAndres Salomon * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18f71e1afdSAndres Salomon * GNU General Public License for more details. 19f71e1afdSAndres Salomon * 20f71e1afdSAndres Salomon * You should have received a copy of the GNU General Public License 21f71e1afdSAndres Salomon * along with this program; if not, write to the Free Software 22f71e1afdSAndres Salomon * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 23f71e1afdSAndres Salomon */ 24f71e1afdSAndres Salomon 25f71e1afdSAndres Salomon #include <linux/kernel.h> 26f71e1afdSAndres Salomon #include <linux/init.h> 27f71e1afdSAndres Salomon #include <linux/mfd/core.h> 28f71e1afdSAndres Salomon #include <linux/module.h> 29f71e1afdSAndres Salomon #include <linux/pci.h> 30fa1df691SAndres Salomon #include <asm/olpc.h> 31f71e1afdSAndres Salomon 32f71e1afdSAndres Salomon #define DRV_NAME "cs5535-mfd" 33f71e1afdSAndres Salomon 34f71e1afdSAndres Salomon enum cs5535_mfd_bars { 35f71e1afdSAndres Salomon SMB_BAR = 0, 36f71e1afdSAndres Salomon GPIO_BAR = 1, 37f71e1afdSAndres Salomon MFGPT_BAR = 2, 38f71e1afdSAndres Salomon PMS_BAR = 4, 39f71e1afdSAndres Salomon ACPI_BAR = 5, 40f71e1afdSAndres Salomon NR_BARS, 41f71e1afdSAndres Salomon }; 42f71e1afdSAndres Salomon 431310e6d6SAndres Salomon static int cs5535_mfd_res_enable(struct platform_device *pdev) 441310e6d6SAndres Salomon { 451310e6d6SAndres Salomon struct resource *res; 461310e6d6SAndres Salomon 471310e6d6SAndres Salomon res = platform_get_resource(pdev, IORESOURCE_IO, 0); 481310e6d6SAndres Salomon if (!res) { 491310e6d6SAndres Salomon dev_err(&pdev->dev, "can't fetch device resource info\n"); 501310e6d6SAndres Salomon return -EIO; 511310e6d6SAndres Salomon } 521310e6d6SAndres Salomon 531310e6d6SAndres Salomon if (!request_region(res->start, resource_size(res), DRV_NAME)) { 541310e6d6SAndres Salomon dev_err(&pdev->dev, "can't request region\n"); 551310e6d6SAndres Salomon return -EIO; 561310e6d6SAndres Salomon } 571310e6d6SAndres Salomon 581310e6d6SAndres Salomon return 0; 591310e6d6SAndres Salomon } 601310e6d6SAndres Salomon 611310e6d6SAndres Salomon static int cs5535_mfd_res_disable(struct platform_device *pdev) 621310e6d6SAndres Salomon { 631310e6d6SAndres Salomon struct resource *res; 641310e6d6SAndres Salomon res = platform_get_resource(pdev, IORESOURCE_IO, 0); 651310e6d6SAndres Salomon if (!res) { 661310e6d6SAndres Salomon dev_err(&pdev->dev, "can't fetch device resource info\n"); 671310e6d6SAndres Salomon return -EIO; 681310e6d6SAndres Salomon } 691310e6d6SAndres Salomon 701310e6d6SAndres Salomon release_region(res->start, resource_size(res)); 711310e6d6SAndres Salomon return 0; 721310e6d6SAndres Salomon } 731310e6d6SAndres Salomon 74f71e1afdSAndres Salomon static __devinitdata struct resource cs5535_mfd_resources[NR_BARS]; 75f71e1afdSAndres Salomon 76f71e1afdSAndres Salomon static __devinitdata struct mfd_cell cs5535_mfd_cells[] = { 77f71e1afdSAndres Salomon { 78f71e1afdSAndres Salomon .id = SMB_BAR, 79f71e1afdSAndres Salomon .name = "cs5535-smb", 80f71e1afdSAndres Salomon .num_resources = 1, 81f71e1afdSAndres Salomon .resources = &cs5535_mfd_resources[SMB_BAR], 82f71e1afdSAndres Salomon }, 83f71e1afdSAndres Salomon { 84f71e1afdSAndres Salomon .id = GPIO_BAR, 85f71e1afdSAndres Salomon .name = "cs5535-gpio", 86f71e1afdSAndres Salomon .num_resources = 1, 87f71e1afdSAndres Salomon .resources = &cs5535_mfd_resources[GPIO_BAR], 88f71e1afdSAndres Salomon }, 89f71e1afdSAndres Salomon { 90f71e1afdSAndres Salomon .id = MFGPT_BAR, 91f71e1afdSAndres Salomon .name = "cs5535-mfgpt", 92f71e1afdSAndres Salomon .num_resources = 1, 93f71e1afdSAndres Salomon .resources = &cs5535_mfd_resources[MFGPT_BAR], 94f71e1afdSAndres Salomon }, 95f71e1afdSAndres Salomon { 96f71e1afdSAndres Salomon .id = PMS_BAR, 97f71e1afdSAndres Salomon .name = "cs5535-pms", 98f71e1afdSAndres Salomon .num_resources = 1, 99f71e1afdSAndres Salomon .resources = &cs5535_mfd_resources[PMS_BAR], 1001310e6d6SAndres Salomon 1011310e6d6SAndres Salomon .enable = cs5535_mfd_res_enable, 1021310e6d6SAndres Salomon .disable = cs5535_mfd_res_disable, 103f71e1afdSAndres Salomon }, 104f71e1afdSAndres Salomon { 105f71e1afdSAndres Salomon .id = ACPI_BAR, 106f71e1afdSAndres Salomon .name = "cs5535-acpi", 107f71e1afdSAndres Salomon .num_resources = 1, 108f71e1afdSAndres Salomon .resources = &cs5535_mfd_resources[ACPI_BAR], 1091310e6d6SAndres Salomon 1101310e6d6SAndres Salomon .enable = cs5535_mfd_res_enable, 1111310e6d6SAndres Salomon .disable = cs5535_mfd_res_disable, 112f71e1afdSAndres Salomon }, 113f71e1afdSAndres Salomon }; 114f71e1afdSAndres Salomon 115fa1df691SAndres Salomon #ifdef CONFIG_OLPC 116fa1df691SAndres Salomon static void __devinit cs5535_clone_olpc_cells(void) 117fa1df691SAndres Salomon { 118fa1df691SAndres Salomon const char *acpi_clones[] = { "olpc-xo1-acpi" }; 119fa1df691SAndres Salomon const char *pms_clones[] = { "olpc-xo1-pms" }; 120fa1df691SAndres Salomon 121fa1df691SAndres Salomon if (!machine_is_olpc()) 122fa1df691SAndres Salomon return; 123fa1df691SAndres Salomon 124fa1df691SAndres Salomon mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones)); 125fa1df691SAndres Salomon mfd_clone_cell("cs5535-pms", pms_clones, ARRAY_SIZE(pms_clones)); 126fa1df691SAndres Salomon } 127fa1df691SAndres Salomon #else 128fa1df691SAndres Salomon static void cs5535_clone_olpc_cells(void) { } 129fa1df691SAndres Salomon #endif 130fa1df691SAndres Salomon 131f71e1afdSAndres Salomon static int __devinit cs5535_mfd_probe(struct pci_dev *pdev, 132f71e1afdSAndres Salomon const struct pci_device_id *id) 133f71e1afdSAndres Salomon { 134f71e1afdSAndres Salomon int err, i; 135f71e1afdSAndres Salomon 136f71e1afdSAndres Salomon err = pci_enable_device(pdev); 137f71e1afdSAndres Salomon if (err) 138f71e1afdSAndres Salomon return err; 139f71e1afdSAndres Salomon 140f71e1afdSAndres Salomon /* fill in IO range for each cell; subdrivers handle the region */ 141f71e1afdSAndres Salomon for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) { 142f71e1afdSAndres Salomon int bar = cs5535_mfd_cells[i].id; 143f71e1afdSAndres Salomon struct resource *r = &cs5535_mfd_resources[bar]; 144f71e1afdSAndres Salomon 145f71e1afdSAndres Salomon r->flags = IORESOURCE_IO; 146f71e1afdSAndres Salomon r->start = pci_resource_start(pdev, bar); 147f71e1afdSAndres Salomon r->end = pci_resource_end(pdev, bar); 148f71e1afdSAndres Salomon 149f71e1afdSAndres Salomon /* id is used for temporarily storing BAR; unset it now */ 150f71e1afdSAndres Salomon cs5535_mfd_cells[i].id = 0; 151f71e1afdSAndres Salomon } 152f71e1afdSAndres Salomon 153f71e1afdSAndres Salomon err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells, 154f71e1afdSAndres Salomon ARRAY_SIZE(cs5535_mfd_cells), NULL, 0); 155f71e1afdSAndres Salomon if (err) { 156f71e1afdSAndres Salomon dev_err(&pdev->dev, "MFD add devices failed: %d\n", err); 157f71e1afdSAndres Salomon goto err_disable; 158f71e1afdSAndres Salomon } 159fa1df691SAndres Salomon cs5535_clone_olpc_cells(); 160f71e1afdSAndres Salomon 161816b4580SAndres Salomon dev_info(&pdev->dev, "%zu devices registered.\n", 162f71e1afdSAndres Salomon ARRAY_SIZE(cs5535_mfd_cells)); 163f71e1afdSAndres Salomon 164f71e1afdSAndres Salomon return 0; 165f71e1afdSAndres Salomon 166f71e1afdSAndres Salomon err_disable: 167f71e1afdSAndres Salomon pci_disable_device(pdev); 168f71e1afdSAndres Salomon return err; 169f71e1afdSAndres Salomon } 170f71e1afdSAndres Salomon 171f71e1afdSAndres Salomon static void __devexit cs5535_mfd_remove(struct pci_dev *pdev) 172f71e1afdSAndres Salomon { 173f71e1afdSAndres Salomon mfd_remove_devices(&pdev->dev); 174f71e1afdSAndres Salomon pci_disable_device(pdev); 175f71e1afdSAndres Salomon } 176f71e1afdSAndres Salomon 177f71e1afdSAndres Salomon static struct pci_device_id cs5535_mfd_pci_tbl[] = { 178f71e1afdSAndres Salomon { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) }, 179f71e1afdSAndres Salomon { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) }, 180f71e1afdSAndres Salomon { 0, } 181f71e1afdSAndres Salomon }; 182f71e1afdSAndres Salomon MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl); 183f71e1afdSAndres Salomon 184f71e1afdSAndres Salomon static struct pci_driver cs5535_mfd_drv = { 185f71e1afdSAndres Salomon .name = DRV_NAME, 186f71e1afdSAndres Salomon .id_table = cs5535_mfd_pci_tbl, 187f71e1afdSAndres Salomon .probe = cs5535_mfd_probe, 188f71e1afdSAndres Salomon .remove = __devexit_p(cs5535_mfd_remove), 189f71e1afdSAndres Salomon }; 190f71e1afdSAndres Salomon 191f71e1afdSAndres Salomon static int __init cs5535_mfd_init(void) 192f71e1afdSAndres Salomon { 193f71e1afdSAndres Salomon return pci_register_driver(&cs5535_mfd_drv); 194f71e1afdSAndres Salomon } 195f71e1afdSAndres Salomon 196f71e1afdSAndres Salomon static void __exit cs5535_mfd_exit(void) 197f71e1afdSAndres Salomon { 198f71e1afdSAndres Salomon pci_unregister_driver(&cs5535_mfd_drv); 199f71e1afdSAndres Salomon } 200f71e1afdSAndres Salomon 201f71e1afdSAndres Salomon module_init(cs5535_mfd_init); 202f71e1afdSAndres Salomon module_exit(cs5535_mfd_exit); 203f71e1afdSAndres Salomon 204f71e1afdSAndres Salomon MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>"); 205f71e1afdSAndres Salomon MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device"); 206f71e1afdSAndres Salomon MODULE_LICENSE("GPL"); 207