Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 1 | /* |
Grant Likely | ca632f5 | 2011-06-06 01:16:30 -0600 | [diff] [blame] | 2 | * PCI interface driver for DW SPI Core |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 3 | * |
Andy Shevchenko | 5dc23c4 | 2014-08-29 12:41:43 +0300 | [diff] [blame] | 4 | * Copyright (c) 2009, 2014 Intel Corporation. |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms and conditions of the GNU General Public License, |
| 8 | * version 2, as published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 13 | * more details. |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/pci.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 18 | #include <linux/slab.h> |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 19 | #include <linux/spi/spi.h> |
Paul Gortmaker | d7614de | 2011-07-03 15:44:29 -0400 | [diff] [blame] | 20 | #include <linux/module.h> |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 21 | |
Grant Likely | ca632f5 | 2011-06-06 01:16:30 -0600 | [diff] [blame] | 22 | #include "spi-dw.h" |
Grant Likely | 568a60e | 2011-02-28 12:47:12 -0700 | [diff] [blame] | 23 | |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 24 | #define DRIVER_NAME "dw_spi_pci" |
| 25 | |
Andy Shevchenko | c95791b | 2014-08-29 12:41:42 +0300 | [diff] [blame] | 26 | struct spi_pci_desc { |
| 27 | int (*setup)(struct dw_spi *); |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 28 | u16 num_cs; |
| 29 | u16 bus_num; |
Andy Shevchenko | c95791b | 2014-08-29 12:41:42 +0300 | [diff] [blame] | 30 | }; |
| 31 | |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 32 | static struct spi_pci_desc spi_pci_mid_desc_1 = { |
Andy Shevchenko | c95791b | 2014-08-29 12:41:42 +0300 | [diff] [blame] | 33 | .setup = dw_spi_mid_init, |
Andy Shevchenko | 307ed83 | 2015-02-23 17:55:54 +0200 | [diff] [blame] | 34 | .num_cs = 5, |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 35 | .bus_num = 0, |
| 36 | }; |
| 37 | |
| 38 | static struct spi_pci_desc spi_pci_mid_desc_2 = { |
| 39 | .setup = dw_spi_mid_init, |
Andy Shevchenko | 307ed83 | 2015-02-23 17:55:54 +0200 | [diff] [blame] | 40 | .num_cs = 2, |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 41 | .bus_num = 1, |
Andy Shevchenko | c95791b | 2014-08-29 12:41:42 +0300 | [diff] [blame] | 42 | }; |
| 43 | |
| 44 | static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 45 | { |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 46 | struct dw_spi *dws; |
Andy Shevchenko | c95791b | 2014-08-29 12:41:42 +0300 | [diff] [blame] | 47 | struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data; |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 48 | int pci_bar = 0; |
| 49 | int ret; |
| 50 | |
Baruch Siach | 04f421e | 2013-12-30 20:30:44 +0200 | [diff] [blame] | 51 | ret = pcim_enable_device(pdev); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 52 | if (ret) |
| 53 | return ret; |
| 54 | |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 55 | dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL); |
| 56 | if (!dws) |
Baruch Siach | 04f421e | 2013-12-30 20:30:44 +0200 | [diff] [blame] | 57 | return -ENOMEM; |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 58 | |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 59 | /* Get basic io resource and map it */ |
| 60 | dws->paddr = pci_resource_start(pdev, pci_bar); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 61 | |
Andy Shevchenko | ceb86de | 2014-08-29 12:41:40 +0300 | [diff] [blame] | 62 | ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev)); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 63 | if (ret) |
Baruch Siach | 04f421e | 2013-12-30 20:30:44 +0200 | [diff] [blame] | 64 | return ret; |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 65 | |
Andy Shevchenko | c9d5d6fe | 2014-08-27 16:21:12 +0300 | [diff] [blame] | 66 | dws->regs = pcim_iomap_table(pdev)[pci_bar]; |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 67 | dws->irq = pdev->irq; |
Feng Tang | 7063c0d | 2010-12-24 13:59:11 +0800 | [diff] [blame] | 68 | |
| 69 | /* |
Andy Shevchenko | c95791b | 2014-08-29 12:41:42 +0300 | [diff] [blame] | 70 | * Specific handling for paltforms, like dma setup, |
Feng Tang | 7063c0d | 2010-12-24 13:59:11 +0800 | [diff] [blame] | 71 | * clock rate, FIFO depth. |
| 72 | */ |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 73 | if (desc) { |
Andy Shevchenko | d9c1474 | 2015-01-22 17:59:34 +0200 | [diff] [blame] | 74 | dws->num_cs = desc->num_cs; |
| 75 | dws->bus_num = desc->bus_num; |
| 76 | |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 77 | if (desc->setup) { |
| 78 | ret = desc->setup(dws); |
| 79 | if (ret) |
| 80 | return ret; |
| 81 | } |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 82 | } else { |
| 83 | return -ENODEV; |
Feng Tang | 7063c0d | 2010-12-24 13:59:11 +0800 | [diff] [blame] | 84 | } |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 85 | |
Baruch Siach | 04f421e | 2013-12-30 20:30:44 +0200 | [diff] [blame] | 86 | ret = dw_spi_add_host(&pdev->dev, dws); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 87 | if (ret) |
Baruch Siach | 04f421e | 2013-12-30 20:30:44 +0200 | [diff] [blame] | 88 | return ret; |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 89 | |
| 90 | /* PCI hook and SPI hook use the same drv data */ |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 91 | pci_set_drvdata(pdev, dws); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 92 | |
Andy Shevchenko | fcf0af4 | 2014-08-29 12:41:39 +0300 | [diff] [blame] | 93 | dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n", |
| 94 | pdev->vendor, pdev->device); |
| 95 | |
Baruch Siach | 04f421e | 2013-12-30 20:30:44 +0200 | [diff] [blame] | 96 | return 0; |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 97 | } |
| 98 | |
Grant Likely | fd4a319 | 2012-12-07 16:57:14 +0000 | [diff] [blame] | 99 | static void spi_pci_remove(struct pci_dev *pdev) |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 100 | { |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 101 | struct dw_spi *dws = pci_get_drvdata(pdev); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 102 | |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 103 | dw_spi_remove_host(dws); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 104 | } |
| 105 | |
Andy Shevchenko | 35f2d41 | 2014-08-29 12:41:41 +0300 | [diff] [blame] | 106 | #ifdef CONFIG_PM_SLEEP |
| 107 | static int spi_suspend(struct device *dev) |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 108 | { |
Andy Shevchenko | 35f2d41 | 2014-08-29 12:41:41 +0300 | [diff] [blame] | 109 | struct pci_dev *pdev = to_pci_dev(dev); |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 110 | struct dw_spi *dws = pci_get_drvdata(pdev); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 111 | |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 112 | return dw_spi_suspend_host(dws); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 113 | } |
| 114 | |
Andy Shevchenko | 35f2d41 | 2014-08-29 12:41:41 +0300 | [diff] [blame] | 115 | static int spi_resume(struct device *dev) |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 116 | { |
Andy Shevchenko | 35f2d41 | 2014-08-29 12:41:41 +0300 | [diff] [blame] | 117 | struct pci_dev *pdev = to_pci_dev(dev); |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 118 | struct dw_spi *dws = pci_get_drvdata(pdev); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 119 | |
Andy Shevchenko | 1c2df96 | 2015-10-14 23:12:24 +0300 | [diff] [blame^] | 120 | return dw_spi_resume_host(dws); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 121 | } |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 122 | #endif |
| 123 | |
Andy Shevchenko | 35f2d41 | 2014-08-29 12:41:41 +0300 | [diff] [blame] | 124 | static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume); |
| 125 | |
Jingoo Han | 9a21e47 | 2013-12-03 08:25:19 +0900 | [diff] [blame] | 126 | static const struct pci_device_id pci_ids[] = { |
Feng Tang | 7063c0d | 2010-12-24 13:59:11 +0800 | [diff] [blame] | 127 | /* Intel MID platform SPI controller 0 */ |
Andy Shevchenko | d58cf5f | 2015-01-07 17:15:00 +0200 | [diff] [blame] | 128 | /* |
| 129 | * The access to the device 8086:0801 is disabled by HW, since it's |
| 130 | * exclusively used by SCU to communicate with MSIC. |
| 131 | */ |
| 132 | /* Intel MID platform SPI controller 1 */ |
| 133 | { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1}, |
| 134 | /* Intel MID platform SPI controller 2 */ |
| 135 | { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2}, |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 136 | {}, |
| 137 | }; |
| 138 | |
| 139 | static struct pci_driver dw_spi_driver = { |
| 140 | .name = DRIVER_NAME, |
| 141 | .id_table = pci_ids, |
| 142 | .probe = spi_pci_probe, |
Grant Likely | fd4a319 | 2012-12-07 16:57:14 +0000 | [diff] [blame] | 143 | .remove = spi_pci_remove, |
Andy Shevchenko | 35f2d41 | 2014-08-29 12:41:41 +0300 | [diff] [blame] | 144 | .driver = { |
| 145 | .pm = &dw_spi_pm_ops, |
| 146 | }, |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 147 | }; |
| 148 | |
Axel Lin | 8ebb35f | 2012-04-04 22:29:32 +0800 | [diff] [blame] | 149 | module_pci_driver(dw_spi_driver); |
Feng Tang | e24c745 | 2009-12-14 14:20:22 -0800 | [diff] [blame] | 150 | |
| 151 | MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>"); |
| 152 | MODULE_DESCRIPTION("PCI interface driver for DW SPI Core"); |
| 153 | MODULE_LICENSE("GPL v2"); |