treewide: Add SPDX license identifier for more missed files
[linux-2.6-block.git] / drivers / spi / spi-pxa2xx-pci.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
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2/*
3 * CE4100's SPI device is more or less the same one as found on PXA
4 *
e379d2cd 5 * Copyright (C) 2016, Intel Corporation
d6ea3df0 6 */
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7#include <linux/clk-provider.h>
8#include <linux/module.h>
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9#include <linux/pci.h>
10#include <linux/platform_device.h>
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11#include <linux/spi/pxa2xx_spi.h>
12
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13#include <linux/dmaengine.h>
14#include <linux/platform_data/dma-dw.h>
15
d6ba32d5 16enum {
e379d2cd 17 PORT_QUARK_X1000,
d6ba32d5 18 PORT_BYT,
4f470910 19 PORT_MRFLD,
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20 PORT_BSW0,
21 PORT_BSW1,
22 PORT_BSW2,
e379d2cd 23 PORT_CE4100,
caba248d 24 PORT_LPT,
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25};
26
27struct pxa_spi_info {
28 enum pxa_ssp_type type;
29 int port_id;
30 int num_chipselect;
afa93c90 31 unsigned long max_clk_rate;
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32
33 /* DMA channel request parameters */
743485ea 34 bool (*dma_filter)(struct dma_chan *chan, void *param);
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35 void *tx_param;
36 void *rx_param;
743485ea 37
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38 int dma_burst_size;
39
743485ea 40 int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
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41};
42
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43static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
44static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
45
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46static struct dw_dma_slave mrfld3_tx_param = { .dst_id = 15 };
47static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
48static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
49static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
50static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
51static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
52
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53static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
54static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
55static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
56static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
57static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
58static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
59
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60static struct dw_dma_slave lpt_tx_param = { .dst_id = 0 };
61static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };
62
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63static bool lpss_dma_filter(struct dma_chan *chan, void *param)
64{
65 struct dw_dma_slave *dws = param;
66
67 if (dws->dma_dev != chan->device->dev)
68 return false;
69
70 chan->private = dws;
71 return true;
72}
73
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74static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
75{
76 struct pci_dev *dma_dev;
77
78 c->num_chipselect = 1;
79 c->max_clk_rate = 50000000;
80
81 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
82
83 if (c->tx_param) {
84 struct dw_dma_slave *slave = c->tx_param;
85
86 slave->dma_dev = &dma_dev->dev;
87 slave->m_master = 0;
88 slave->p_master = 1;
89 }
90
91 if (c->rx_param) {
92 struct dw_dma_slave *slave = c->rx_param;
93
94 slave->dma_dev = &dma_dev->dev;
95 slave->m_master = 0;
96 slave->p_master = 1;
97 }
98
99 c->dma_filter = lpss_dma_filter;
100 return 0;
101}
102
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103static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
104{
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105 struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
106 struct dw_dma_slave *tx, *rx;
107
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108 switch (PCI_FUNC(dev->devfn)) {
109 case 0:
110 c->port_id = 3;
111 c->num_chipselect = 1;
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112 c->tx_param = &mrfld3_tx_param;
113 c->rx_param = &mrfld3_rx_param;
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114 break;
115 case 1:
116 c->port_id = 5;
117 c->num_chipselect = 4;
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118 c->tx_param = &mrfld5_tx_param;
119 c->rx_param = &mrfld5_rx_param;
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120 break;
121 case 2:
122 c->port_id = 6;
123 c->num_chipselect = 1;
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124 c->tx_param = &mrfld6_tx_param;
125 c->rx_param = &mrfld6_rx_param;
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126 break;
127 default:
128 return -ENODEV;
129 }
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130
131 tx = c->tx_param;
132 tx->dma_dev = &dma_dev->dev;
133
134 rx = c->rx_param;
135 rx->dma_dev = &dma_dev->dev;
136
137 c->dma_filter = lpss_dma_filter;
37821a82 138 c->dma_burst_size = 8;
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139 return 0;
140}
141
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142static struct pxa_spi_info spi_info_configs[] = {
143 [PORT_CE4100] = {
144 .type = PXA25x_SSP,
145 .port_id = -1,
146 .num_chipselect = -1,
afa93c90 147 .max_clk_rate = 3686400,
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148 },
149 [PORT_BYT] = {
03fbf488 150 .type = LPSS_BYT_SSP,
d6ba32d5 151 .port_id = 0,
743485ea 152 .setup = lpss_spi_setup,
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153 .tx_param = &byt_tx_param,
154 .rx_param = &byt_rx_param,
d6ba32d5 155 },
39d36536 156 [PORT_BSW0] = {
ca80ef71 157 .type = LPSS_BSW_SSP,
39d36536 158 .port_id = 0,
743485ea 159 .setup = lpss_spi_setup,
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160 .tx_param = &bsw0_tx_param,
161 .rx_param = &bsw0_rx_param,
162 },
163 [PORT_BSW1] = {
ca80ef71 164 .type = LPSS_BSW_SSP,
39d36536 165 .port_id = 1,
743485ea 166 .setup = lpss_spi_setup,
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167 .tx_param = &bsw1_tx_param,
168 .rx_param = &bsw1_rx_param,
169 },
170 [PORT_BSW2] = {
ca80ef71 171 .type = LPSS_BSW_SSP,
39d36536 172 .port_id = 2,
743485ea 173 .setup = lpss_spi_setup,
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174 .tx_param = &bsw2_tx_param,
175 .rx_param = &bsw2_rx_param,
d6ba32d5 176 },
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177 [PORT_MRFLD] = {
178 .type = PXA27x_SSP,
179 .max_clk_rate = 25000000,
180 .setup = mrfld_spi_setup,
181 },
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182 [PORT_QUARK_X1000] = {
183 .type = QUARK_X1000_SSP,
184 .port_id = -1,
185 .num_chipselect = 1,
186 .max_clk_rate = 50000000,
187 },
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188 [PORT_LPT] = {
189 .type = LPSS_LPT_SSP,
190 .port_id = 0,
743485ea 191 .setup = lpss_spi_setup,
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192 .tx_param = &lpt_tx_param,
193 .rx_param = &lpt_rx_param,
194 },
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195};
196
197static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
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198 const struct pci_device_id *ent)
199{
0202775b 200 struct platform_device_info pi;
d6ea3df0 201 int ret;
d6ea3df0 202 struct platform_device *pdev;
51eea52d 203 struct pxa2xx_spi_controller spi_pdata;
d6ea3df0 204 struct ssp_device *ssp;
d6ba32d5 205 struct pxa_spi_info *c;
afa93c90 206 char buf[40];
d6ea3df0 207
0202775b 208 ret = pcim_enable_device(dev);
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209 if (ret)
210 return ret;
211
0202775b 212 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
c1346340 213 if (ret)
d6ea3df0 214 return ret;
d6ea3df0 215
d6ba32d5 216 c = &spi_info_configs[ent->driver_data];
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217 if (c->setup) {
218 ret = c->setup(dev, c);
219 if (ret)
220 return ret;
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221 }
222
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223 memset(&spi_pdata, 0, sizeof(spi_pdata));
224 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
225 spi_pdata.dma_filter = c->dma_filter;
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226 spi_pdata.tx_param = c->tx_param;
227 spi_pdata.rx_param = c->rx_param;
228 spi_pdata.enable_dma = c->rx_param && c->tx_param;
37821a82 229 spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1;
d6ea3df0 230
851bacf5 231 ssp = &spi_pdata.ssp;
d6ea3df0 232 ssp->phys_base = pci_resource_start(dev, 0);
0202775b 233 ssp->mmio_base = pcim_iomap_table(dev)[0];
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234 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
235 ssp->type = c->type;
d6ea3df0 236
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237 pci_set_master(dev);
238
239 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
240 if (ret < 0)
241 return ret;
242 ssp->irq = pci_irq_vector(dev, 0);
243
afa93c90 244 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
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245 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
246 c->max_clk_rate);
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247 if (IS_ERR(ssp->clk))
248 return PTR_ERR(ssp->clk);
249
0202775b 250 memset(&pi, 0, sizeof(pi));
b70cd2de 251 pi.fwnode = dev->dev.fwnode;
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252 pi.parent = &dev->dev;
253 pi.name = "pxa2xx-spi";
254 pi.id = ssp->port_id;
255 pi.data = &spi_pdata;
256 pi.size_data = sizeof(spi_pdata);
d6ea3df0 257
0202775b 258 pdev = platform_device_register_full(&pi);
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259 if (IS_ERR(pdev)) {
260 clk_unregister(ssp->clk);
d77b5382 261 return PTR_ERR(pdev);
afa93c90 262 }
d6ea3df0 263
851bacf5 264 pci_set_drvdata(dev, pdev);
d6ea3df0 265
0202775b 266 return 0;
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267}
268
d6ba32d5 269static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
d6ea3df0 270{
851bacf5 271 struct platform_device *pdev = pci_get_drvdata(dev);
51eea52d 272 struct pxa2xx_spi_controller *spi_pdata;
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273
274 spi_pdata = dev_get_platdata(&pdev->dev);
d6ea3df0 275
851bacf5 276 platform_device_unregister(pdev);
afa93c90 277 clk_unregister(spi_pdata->ssp.clk);
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278}
279
d6ba32d5 280static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
e5262d05 281 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
d6ba32d5 282 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
4f470910 283 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
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284 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
285 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
286 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
e379d2cd 287 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
caba248d 288 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
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289 { },
290};
d6ba32d5 291MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
d6ea3df0 292
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293static struct pci_driver pxa2xx_spi_pci_driver = {
294 .name = "pxa2xx_spi_pci",
295 .id_table = pxa2xx_spi_pci_devices,
296 .probe = pxa2xx_spi_pci_probe,
297 .remove = pxa2xx_spi_pci_remove,
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298};
299
d6ba32d5 300module_pci_driver(pxa2xx_spi_pci_driver);
d6ea3df0 301
d6ba32d5 302MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
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303MODULE_LICENSE("GPL v2");
304MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");