Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[linux-block.git] / drivers / spi / spi-pxa2xx-pci.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
d6ea3df0
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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 */
e379d2cd
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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,
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24 PORT_LPT0,
25 PORT_LPT1,
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26};
27
28struct pxa_spi_info {
29 enum pxa_ssp_type type;
30 int port_id;
31 int num_chipselect;
afa93c90 32 unsigned long max_clk_rate;
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33
34 /* DMA channel request parameters */
743485ea 35 bool (*dma_filter)(struct dma_chan *chan, void *param);
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36 void *tx_param;
37 void *rx_param;
743485ea 38
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39 int dma_burst_size;
40
743485ea 41 int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
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42};
43
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44static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
45static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
46
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47static struct dw_dma_slave mrfld3_tx_param = { .dst_id = 15 };
48static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
49static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
50static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
51static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
52static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
53
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54static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
55static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
56static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
57static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
58static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
59static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
60
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61static struct dw_dma_slave lpt1_tx_param = { .dst_id = 0 };
62static struct dw_dma_slave lpt1_rx_param = { .src_id = 1 };
63static struct dw_dma_slave lpt0_tx_param = { .dst_id = 2 };
64static struct dw_dma_slave lpt0_rx_param = { .src_id = 3 };
caba248d 65
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66static bool lpss_dma_filter(struct dma_chan *chan, void *param)
67{
68 struct dw_dma_slave *dws = param;
69
70 if (dws->dma_dev != chan->device->dev)
71 return false;
72
73 chan->private = dws;
74 return true;
75}
76
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77static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
78{
79 struct pci_dev *dma_dev;
80
81 c->num_chipselect = 1;
82 c->max_clk_rate = 50000000;
83
84 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
85
86 if (c->tx_param) {
87 struct dw_dma_slave *slave = c->tx_param;
88
89 slave->dma_dev = &dma_dev->dev;
90 slave->m_master = 0;
91 slave->p_master = 1;
92 }
93
94 if (c->rx_param) {
95 struct dw_dma_slave *slave = c->rx_param;
96
97 slave->dma_dev = &dma_dev->dev;
98 slave->m_master = 0;
99 slave->p_master = 1;
100 }
101
102 c->dma_filter = lpss_dma_filter;
103 return 0;
104}
105
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106static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
107{
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108 struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
109 struct dw_dma_slave *tx, *rx;
110
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111 switch (PCI_FUNC(dev->devfn)) {
112 case 0:
113 c->port_id = 3;
114 c->num_chipselect = 1;
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115 c->tx_param = &mrfld3_tx_param;
116 c->rx_param = &mrfld3_rx_param;
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117 break;
118 case 1:
119 c->port_id = 5;
120 c->num_chipselect = 4;
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121 c->tx_param = &mrfld5_tx_param;
122 c->rx_param = &mrfld5_rx_param;
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123 break;
124 case 2:
125 c->port_id = 6;
126 c->num_chipselect = 1;
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127 c->tx_param = &mrfld6_tx_param;
128 c->rx_param = &mrfld6_rx_param;
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129 break;
130 default:
131 return -ENODEV;
132 }
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133
134 tx = c->tx_param;
135 tx->dma_dev = &dma_dev->dev;
136
137 rx = c->rx_param;
138 rx->dma_dev = &dma_dev->dev;
139
140 c->dma_filter = lpss_dma_filter;
37821a82 141 c->dma_burst_size = 8;
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142 return 0;
143}
144
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145static struct pxa_spi_info spi_info_configs[] = {
146 [PORT_CE4100] = {
147 .type = PXA25x_SSP,
148 .port_id = -1,
149 .num_chipselect = -1,
afa93c90 150 .max_clk_rate = 3686400,
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151 },
152 [PORT_BYT] = {
03fbf488 153 .type = LPSS_BYT_SSP,
d6ba32d5 154 .port_id = 0,
743485ea 155 .setup = lpss_spi_setup,
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156 .tx_param = &byt_tx_param,
157 .rx_param = &byt_rx_param,
d6ba32d5 158 },
39d36536 159 [PORT_BSW0] = {
ca80ef71 160 .type = LPSS_BSW_SSP,
39d36536 161 .port_id = 0,
743485ea 162 .setup = lpss_spi_setup,
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163 .tx_param = &bsw0_tx_param,
164 .rx_param = &bsw0_rx_param,
165 },
166 [PORT_BSW1] = {
ca80ef71 167 .type = LPSS_BSW_SSP,
39d36536 168 .port_id = 1,
743485ea 169 .setup = lpss_spi_setup,
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170 .tx_param = &bsw1_tx_param,
171 .rx_param = &bsw1_rx_param,
172 },
173 [PORT_BSW2] = {
ca80ef71 174 .type = LPSS_BSW_SSP,
39d36536 175 .port_id = 2,
743485ea 176 .setup = lpss_spi_setup,
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177 .tx_param = &bsw2_tx_param,
178 .rx_param = &bsw2_rx_param,
d6ba32d5 179 },
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180 [PORT_MRFLD] = {
181 .type = PXA27x_SSP,
182 .max_clk_rate = 25000000,
183 .setup = mrfld_spi_setup,
184 },
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185 [PORT_QUARK_X1000] = {
186 .type = QUARK_X1000_SSP,
187 .port_id = -1,
188 .num_chipselect = 1,
189 .max_clk_rate = 50000000,
190 },
54c5d3bf 191 [PORT_LPT0] = {
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192 .type = LPSS_LPT_SSP,
193 .port_id = 0,
743485ea 194 .setup = lpss_spi_setup,
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195 .tx_param = &lpt0_tx_param,
196 .rx_param = &lpt0_rx_param,
197 },
198 [PORT_LPT1] = {
199 .type = LPSS_LPT_SSP,
200 .port_id = 1,
201 .setup = lpss_spi_setup,
202 .tx_param = &lpt1_tx_param,
203 .rx_param = &lpt1_rx_param,
caba248d 204 },
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205};
206
207static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
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208 const struct pci_device_id *ent)
209{
0202775b 210 struct platform_device_info pi;
d6ea3df0 211 int ret;
d6ea3df0 212 struct platform_device *pdev;
51eea52d 213 struct pxa2xx_spi_controller spi_pdata;
d6ea3df0 214 struct ssp_device *ssp;
d6ba32d5 215 struct pxa_spi_info *c;
afa93c90 216 char buf[40];
d6ea3df0 217
0202775b 218 ret = pcim_enable_device(dev);
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219 if (ret)
220 return ret;
221
0202775b 222 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
c1346340 223 if (ret)
d6ea3df0 224 return ret;
d6ea3df0 225
d6ba32d5 226 c = &spi_info_configs[ent->driver_data];
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227 if (c->setup) {
228 ret = c->setup(dev, c);
229 if (ret)
230 return ret;
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231 }
232
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233 memset(&spi_pdata, 0, sizeof(spi_pdata));
234 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
235 spi_pdata.dma_filter = c->dma_filter;
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236 spi_pdata.tx_param = c->tx_param;
237 spi_pdata.rx_param = c->rx_param;
238 spi_pdata.enable_dma = c->rx_param && c->tx_param;
37821a82 239 spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1;
d6ea3df0 240
851bacf5 241 ssp = &spi_pdata.ssp;
d6ea3df0 242 ssp->phys_base = pci_resource_start(dev, 0);
0202775b 243 ssp->mmio_base = pcim_iomap_table(dev)[0];
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244 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
245 ssp->type = c->type;
d6ea3df0 246
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247 pci_set_master(dev);
248
249 ret = pci_alloc_irq_vectors(dev, 1, 1, PCI_IRQ_ALL_TYPES);
250 if (ret < 0)
251 return ret;
252 ssp->irq = pci_irq_vector(dev, 0);
253
afa93c90 254 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
c07caca3 255 ssp->clk = clk_register_fixed_rate(&dev->dev, buf, NULL, 0,
280af2b8 256 c->max_clk_rate);
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257 if (IS_ERR(ssp->clk))
258 return PTR_ERR(ssp->clk);
259
0202775b 260 memset(&pi, 0, sizeof(pi));
b70cd2de 261 pi.fwnode = dev->dev.fwnode;
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262 pi.parent = &dev->dev;
263 pi.name = "pxa2xx-spi";
264 pi.id = ssp->port_id;
265 pi.data = &spi_pdata;
266 pi.size_data = sizeof(spi_pdata);
d6ea3df0 267
0202775b 268 pdev = platform_device_register_full(&pi);
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269 if (IS_ERR(pdev)) {
270 clk_unregister(ssp->clk);
d77b5382 271 return PTR_ERR(pdev);
afa93c90 272 }
d6ea3df0 273
851bacf5 274 pci_set_drvdata(dev, pdev);
d6ea3df0 275
0202775b 276 return 0;
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277}
278
d6ba32d5 279static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
d6ea3df0 280{
851bacf5 281 struct platform_device *pdev = pci_get_drvdata(dev);
51eea52d 282 struct pxa2xx_spi_controller *spi_pdata;
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283
284 spi_pdata = dev_get_platdata(&pdev->dev);
d6ea3df0 285
851bacf5 286 platform_device_unregister(pdev);
afa93c90 287 clk_unregister(spi_pdata->ssp.clk);
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288}
289
d6ba32d5 290static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
e5262d05 291 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
d6ba32d5 292 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
4f470910 293 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
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294 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
295 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
296 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
e379d2cd 297 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
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298 { PCI_VDEVICE(INTEL, 0x9c65), PORT_LPT0 },
299 { PCI_VDEVICE(INTEL, 0x9c66), PORT_LPT1 },
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300 { PCI_VDEVICE(INTEL, 0x9ce5), PORT_LPT0 },
301 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT1 },
302 { }
d6ea3df0 303};
d6ba32d5 304MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
d6ea3df0 305
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306static struct pci_driver pxa2xx_spi_pci_driver = {
307 .name = "pxa2xx_spi_pci",
308 .id_table = pxa2xx_spi_pci_devices,
309 .probe = pxa2xx_spi_pci_probe,
310 .remove = pxa2xx_spi_pci_remove,
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311};
312
d6ba32d5 313module_pci_driver(pxa2xx_spi_pci_driver);
d6ea3df0 314
d6ba32d5 315MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
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316MODULE_LICENSE("GPL v2");
317MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");