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Thomas Gleixner2025cf92019-05-29 07:18:02 -07001// SPDX-License-Identifier: GPL-2.0-only
Feng Tange24c7452009-12-14 14:20:22 -08002/*
Grant Likelyca632f52011-06-06 01:16:30 -06003 * PCI interface driver for DW SPI Core
Feng Tange24c7452009-12-14 14:20:22 -08004 *
Andy Shevchenko5dc23c42014-08-29 12:41:43 +03005 * Copyright (c) 2009, 2014 Intel Corporation.
Feng Tange24c7452009-12-14 14:20:22 -08006 */
7
8#include <linux/interrupt.h>
9#include <linux/pci.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/slab.h>
Feng Tange24c7452009-12-14 14:20:22 -080011#include <linux/spi/spi.h>
Paul Gortmakerd7614de2011-07-03 15:44:29 -040012#include <linux/module.h>
Feng Tange24c7452009-12-14 14:20:22 -080013
Grant Likelyca632f52011-06-06 01:16:30 -060014#include "spi-dw.h"
Grant Likely568a60e2011-02-28 12:47:12 -070015
Feng Tange24c7452009-12-14 14:20:22 -080016#define DRIVER_NAME "dw_spi_pci"
17
Andy Shevchenkoc95791b2014-08-29 12:41:42 +030018struct spi_pci_desc {
19 int (*setup)(struct dw_spi *);
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +020020 u16 num_cs;
21 u16 bus_num;
Jarkko Nikula52718902019-08-12 13:13:44 +030022 u32 max_freq;
Andy Shevchenkoc95791b2014-08-29 12:41:42 +030023};
24
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +020025static struct spi_pci_desc spi_pci_mid_desc_1 = {
Andy Shevchenkoc95791b2014-08-29 12:41:42 +030026 .setup = dw_spi_mid_init,
Andy Shevchenko307ed832015-02-23 17:55:54 +020027 .num_cs = 5,
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +020028 .bus_num = 0,
29};
30
31static struct spi_pci_desc spi_pci_mid_desc_2 = {
32 .setup = dw_spi_mid_init,
Andy Shevchenko307ed832015-02-23 17:55:54 +020033 .num_cs = 2,
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +020034 .bus_num = 1,
Andy Shevchenkoc95791b2014-08-29 12:41:42 +030035};
36
Jarkko Nikula52718902019-08-12 13:13:44 +030037static struct spi_pci_desc spi_pci_ehl_desc = {
38 .num_cs = 1,
39 .bus_num = -1,
40 .max_freq = 100000000,
41};
42
Andy Shevchenkoc95791b2014-08-29 12:41:42 +030043static int spi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
Feng Tange24c7452009-12-14 14:20:22 -080044{
Feng Tange24c7452009-12-14 14:20:22 -080045 struct dw_spi *dws;
Andy Shevchenkoc95791b2014-08-29 12:41:42 +030046 struct spi_pci_desc *desc = (struct spi_pci_desc *)ent->driver_data;
Feng Tange24c7452009-12-14 14:20:22 -080047 int pci_bar = 0;
48 int ret;
49
Baruch Siach04f421e2013-12-30 20:30:44 +020050 ret = pcim_enable_device(pdev);
Feng Tange24c7452009-12-14 14:20:22 -080051 if (ret)
52 return ret;
53
Andy Shevchenko1c2df962015-10-14 23:12:24 +030054 dws = devm_kzalloc(&pdev->dev, sizeof(*dws), GFP_KERNEL);
55 if (!dws)
Baruch Siach04f421e2013-12-30 20:30:44 +020056 return -ENOMEM;
Feng Tange24c7452009-12-14 14:20:22 -080057
Feng Tange24c7452009-12-14 14:20:22 -080058 /* Get basic io resource and map it */
59 dws->paddr = pci_resource_start(pdev, pci_bar);
Feng Tange24c7452009-12-14 14:20:22 -080060
Andy Shevchenkoceb86de2014-08-29 12:41:40 +030061 ret = pcim_iomap_regions(pdev, 1 << pci_bar, pci_name(pdev));
Feng Tange24c7452009-12-14 14:20:22 -080062 if (ret)
Baruch Siach04f421e2013-12-30 20:30:44 +020063 return ret;
Feng Tange24c7452009-12-14 14:20:22 -080064
Andy Shevchenkoc9d5d6fe2014-08-27 16:21:12 +030065 dws->regs = pcim_iomap_table(pdev)[pci_bar];
Feng Tange24c7452009-12-14 14:20:22 -080066 dws->irq = pdev->irq;
Feng Tang7063c0d2010-12-24 13:59:11 +080067
68 /*
Geert Uytterhoeven3208a1c2016-05-10 20:59:58 +020069 * Specific handling for platforms, like dma setup,
Feng Tang7063c0d2010-12-24 13:59:11 +080070 * clock rate, FIFO depth.
71 */
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +020072 if (desc) {
Andy Shevchenkod9c14742015-01-22 17:59:34 +020073 dws->num_cs = desc->num_cs;
74 dws->bus_num = desc->bus_num;
Jarkko Nikula52718902019-08-12 13:13:44 +030075 dws->max_freq = desc->max_freq;
Andy Shevchenkod9c14742015-01-22 17:59:34 +020076
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +020077 if (desc->setup) {
78 ret = desc->setup(dws);
79 if (ret)
80 return ret;
81 }
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +020082 } else {
83 return -ENODEV;
Feng Tang7063c0d2010-12-24 13:59:11 +080084 }
Feng Tange24c7452009-12-14 14:20:22 -080085
Baruch Siach04f421e2013-12-30 20:30:44 +020086 ret = dw_spi_add_host(&pdev->dev, dws);
Feng Tange24c7452009-12-14 14:20:22 -080087 if (ret)
Baruch Siach04f421e2013-12-30 20:30:44 +020088 return ret;
Feng Tange24c7452009-12-14 14:20:22 -080089
90 /* PCI hook and SPI hook use the same drv data */
Andy Shevchenko1c2df962015-10-14 23:12:24 +030091 pci_set_drvdata(pdev, dws);
Feng Tange24c7452009-12-14 14:20:22 -080092
Andy Shevchenkofcf0af42014-08-29 12:41:39 +030093 dev_info(&pdev->dev, "found PCI SPI controller(ID: %04x:%04x)\n",
94 pdev->vendor, pdev->device);
95
Baruch Siach04f421e2013-12-30 20:30:44 +020096 return 0;
Feng Tange24c7452009-12-14 14:20:22 -080097}
98
Grant Likelyfd4a3192012-12-07 16:57:14 +000099static void spi_pci_remove(struct pci_dev *pdev)
Feng Tange24c7452009-12-14 14:20:22 -0800100{
Andy Shevchenko1c2df962015-10-14 23:12:24 +0300101 struct dw_spi *dws = pci_get_drvdata(pdev);
Feng Tange24c7452009-12-14 14:20:22 -0800102
Andy Shevchenko1c2df962015-10-14 23:12:24 +0300103 dw_spi_remove_host(dws);
Feng Tange24c7452009-12-14 14:20:22 -0800104}
105
Andy Shevchenko35f2d412014-08-29 12:41:41 +0300106#ifdef CONFIG_PM_SLEEP
107static int spi_suspend(struct device *dev)
Feng Tange24c7452009-12-14 14:20:22 -0800108{
Chuhong Yuan2a3b6f72019-07-24 20:23:31 +0800109 struct dw_spi *dws = dev_get_drvdata(dev);
Feng Tange24c7452009-12-14 14:20:22 -0800110
Andy Shevchenko1c2df962015-10-14 23:12:24 +0300111 return dw_spi_suspend_host(dws);
Feng Tange24c7452009-12-14 14:20:22 -0800112}
113
Andy Shevchenko35f2d412014-08-29 12:41:41 +0300114static int spi_resume(struct device *dev)
Feng Tange24c7452009-12-14 14:20:22 -0800115{
Chuhong Yuan2a3b6f72019-07-24 20:23:31 +0800116 struct dw_spi *dws = dev_get_drvdata(dev);
Feng Tange24c7452009-12-14 14:20:22 -0800117
Andy Shevchenko1c2df962015-10-14 23:12:24 +0300118 return dw_spi_resume_host(dws);
Feng Tange24c7452009-12-14 14:20:22 -0800119}
Feng Tange24c7452009-12-14 14:20:22 -0800120#endif
121
Andy Shevchenko35f2d412014-08-29 12:41:41 +0300122static SIMPLE_DEV_PM_OPS(dw_spi_pm_ops, spi_suspend, spi_resume);
123
Jingoo Han9a21e472013-12-03 08:25:19 +0900124static const struct pci_device_id pci_ids[] = {
Feng Tang7063c0d2010-12-24 13:59:11 +0800125 /* Intel MID platform SPI controller 0 */
Andy Shevchenkod58cf5f2015-01-07 17:15:00 +0200126 /*
127 * The access to the device 8086:0801 is disabled by HW, since it's
128 * exclusively used by SCU to communicate with MSIC.
129 */
130 /* Intel MID platform SPI controller 1 */
131 { PCI_VDEVICE(INTEL, 0x0800), (kernel_ulong_t)&spi_pci_mid_desc_1},
132 /* Intel MID platform SPI controller 2 */
133 { PCI_VDEVICE(INTEL, 0x0812), (kernel_ulong_t)&spi_pci_mid_desc_2},
Jarkko Nikula52718902019-08-12 13:13:44 +0300134 /* Intel Elkhart Lake PSE SPI controllers */
135 { PCI_VDEVICE(INTEL, 0x4b84), (kernel_ulong_t)&spi_pci_ehl_desc},
136 { PCI_VDEVICE(INTEL, 0x4b85), (kernel_ulong_t)&spi_pci_ehl_desc},
137 { PCI_VDEVICE(INTEL, 0x4b86), (kernel_ulong_t)&spi_pci_ehl_desc},
138 { PCI_VDEVICE(INTEL, 0x4b87), (kernel_ulong_t)&spi_pci_ehl_desc},
Feng Tange24c7452009-12-14 14:20:22 -0800139 {},
140};
Jarkko Nikula94e9c0f2019-08-29 15:50:00 +0300141MODULE_DEVICE_TABLE(pci, pci_ids);
Feng Tange24c7452009-12-14 14:20:22 -0800142
143static struct pci_driver dw_spi_driver = {
144 .name = DRIVER_NAME,
145 .id_table = pci_ids,
146 .probe = spi_pci_probe,
Grant Likelyfd4a3192012-12-07 16:57:14 +0000147 .remove = spi_pci_remove,
Andy Shevchenko35f2d412014-08-29 12:41:41 +0300148 .driver = {
149 .pm = &dw_spi_pm_ops,
150 },
Feng Tange24c7452009-12-14 14:20:22 -0800151};
152
Axel Lin8ebb35f2012-04-04 22:29:32 +0800153module_pci_driver(dw_spi_driver);
Feng Tange24c7452009-12-14 14:20:22 -0800154
155MODULE_AUTHOR("Feng Tang <feng.tang@intel.com>");
156MODULE_DESCRIPTION("PCI interface driver for DW SPI Core");
157MODULE_LICENSE("GPL v2");