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1/*
2 * CE4100's SPI device is more or less the same one as found on PXA
3 *
4 */
5#include <linux/pci.h>
6#include <linux/platform_device.h>
7#include <linux/of_device.h>
8#include <linux/module.h>
9#include <linux/spi/pxa2xx_spi.h>
10
11struct ce4100_info {
12 struct ssp_device ssp;
13 struct platform_device *spi_pdev;
14};
15
16static DEFINE_MUTEX(ssp_lock);
17static LIST_HEAD(ssp_list);
18
19struct ssp_device *pxa_ssp_request(int port, const char *label)
20{
21 struct ssp_device *ssp = NULL;
22
23 mutex_lock(&ssp_lock);
24
25 list_for_each_entry(ssp, &ssp_list, node) {
26 if (ssp->port_id == port && ssp->use_count == 0) {
27 ssp->use_count++;
28 ssp->label = label;
29 break;
30 }
31 }
32
33 mutex_unlock(&ssp_lock);
34
35 if (&ssp->node == &ssp_list)
36 return NULL;
37
38 return ssp;
39}
40EXPORT_SYMBOL_GPL(pxa_ssp_request);
41
42void pxa_ssp_free(struct ssp_device *ssp)
43{
44 mutex_lock(&ssp_lock);
45 if (ssp->use_count) {
46 ssp->use_count--;
47 ssp->label = NULL;
48 } else
49 dev_err(&ssp->pdev->dev, "device already free\n");
50 mutex_unlock(&ssp_lock);
51}
52EXPORT_SYMBOL_GPL(pxa_ssp_free);
53
54static int __devinit ce4100_spi_probe(struct pci_dev *dev,
55 const struct pci_device_id *ent)
56{
57 int ret;
58 resource_size_t phys_beg;
59 resource_size_t phys_len;
60 struct ce4100_info *spi_info;
61 struct platform_device *pdev;
62 struct pxa2xx_spi_master spi_pdata;
63 struct ssp_device *ssp;
64
65 ret = pci_enable_device(dev);
66 if (ret)
67 return ret;
68
69 phys_beg = pci_resource_start(dev, 0);
70 phys_len = pci_resource_len(dev, 0);
71
72 if (!request_mem_region(phys_beg, phys_len,
73 "CE4100 SPI")) {
74 dev_err(&dev->dev, "Can't request register space.\n");
75 ret = -EBUSY;
76 return ret;
77 }
78
79 pdev = platform_device_alloc("pxa2xx-spi", dev->devfn);
80 spi_info = kzalloc(sizeof(*spi_info), GFP_KERNEL);
81 if (!pdev || !spi_info ) {
82 ret = -ENOMEM;
83 goto err_nomem;
84 }
85 memset(&spi_pdata, 0, sizeof(spi_pdata));
86 spi_pdata.num_chipselect = dev->devfn;
87
88 ret = platform_device_add_data(pdev, &spi_pdata, sizeof(spi_pdata));
89 if (ret)
90 goto err_nomem;
91
92 pdev->dev.parent = &dev->dev;
93 pdev->dev.of_node = dev->dev.of_node;
94 ssp = &spi_info->ssp;
95 ssp->phys_base = pci_resource_start(dev, 0);
96 ssp->mmio_base = ioremap(phys_beg, phys_len);
97 if (!ssp->mmio_base) {
98 dev_err(&pdev->dev, "failed to ioremap() registers\n");
99 ret = -EIO;
100 goto err_nomem;
101 }
102 ssp->irq = dev->irq;
103 ssp->port_id = pdev->id;
104 ssp->type = PXA25x_SSP;
105
106 mutex_lock(&ssp_lock);
107 list_add(&ssp->node, &ssp_list);
108 mutex_unlock(&ssp_lock);
109
110 pci_set_drvdata(dev, spi_info);
111
112 ret = platform_device_add(pdev);
113 if (ret)
114 goto err_dev_add;
115
116 return ret;
117
118err_dev_add:
119 pci_set_drvdata(dev, NULL);
120 mutex_lock(&ssp_lock);
121 list_del(&ssp->node);
122 mutex_unlock(&ssp_lock);
123 iounmap(ssp->mmio_base);
124
125err_nomem:
126 release_mem_region(phys_beg, phys_len);
127 platform_device_put(pdev);
128 kfree(spi_info);
129 return ret;
130}
131
132static void __devexit ce4100_spi_remove(struct pci_dev *dev)
133{
134 struct ce4100_info *spi_info;
135 struct ssp_device *ssp;
136
137 spi_info = pci_get_drvdata(dev);
138 ssp = &spi_info->ssp;
139 platform_device_unregister(spi_info->spi_pdev);
140
141 iounmap(ssp->mmio_base);
142 release_mem_region(pci_resource_start(dev, 0),
143 pci_resource_len(dev, 0));
144
145 mutex_lock(&ssp_lock);
146 list_del(&ssp->node);
147 mutex_unlock(&ssp_lock);
148
149 pci_set_drvdata(dev, NULL);
150 pci_disable_device(dev);
151 kfree(spi_info);
152}
153
154static DEFINE_PCI_DEVICE_TABLE(ce4100_spi_devices) = {
155 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2e6a) },
156 { },
157};
158MODULE_DEVICE_TABLE(pci, ce4100_spi_devices);
159
160static struct pci_driver ce4100_spi_driver = {
161 .name = "ce4100_spi",
162 .id_table = ce4100_spi_devices,
163 .probe = ce4100_spi_probe,
164 .remove = __devexit_p(ce4100_spi_remove),
165};
166
167module_pci_driver(ce4100_spi_driver);
168
169MODULE_DESCRIPTION("CE4100 PCI-SPI glue code for PXA's driver");
170MODULE_LICENSE("GPL v2");
171MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");
1/*
2 * CE4100's SPI device is more or less the same one as found on PXA
3 *
4 * Copyright (C) 2016, Intel Corporation
5 */
6#include <linux/clk-provider.h>
7#include <linux/module.h>
8#include <linux/of_device.h>
9#include <linux/pci.h>
10#include <linux/platform_device.h>
11#include <linux/spi/pxa2xx_spi.h>
12
13#include <linux/dmaengine.h>
14#include <linux/platform_data/dma-dw.h>
15
16enum {
17 PORT_QUARK_X1000,
18 PORT_BYT,
19 PORT_MRFLD,
20 PORT_BSW0,
21 PORT_BSW1,
22 PORT_BSW2,
23 PORT_CE4100,
24 PORT_LPT,
25};
26
27struct pxa_spi_info {
28 enum pxa_ssp_type type;
29 int port_id;
30 int num_chipselect;
31 unsigned long max_clk_rate;
32
33 /* DMA channel request parameters */
34 bool (*dma_filter)(struct dma_chan *chan, void *param);
35 void *tx_param;
36 void *rx_param;
37
38 int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
39};
40
41static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
42static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
43
44static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
45static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
46static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
47static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 };
48static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 };
49static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 };
50
51static struct dw_dma_slave lpt_tx_param = { .dst_id = 0 };
52static struct dw_dma_slave lpt_rx_param = { .src_id = 1 };
53
54static bool lpss_dma_filter(struct dma_chan *chan, void *param)
55{
56 struct dw_dma_slave *dws = param;
57
58 if (dws->dma_dev != chan->device->dev)
59 return false;
60
61 chan->private = dws;
62 return true;
63}
64
65static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
66{
67 struct pci_dev *dma_dev;
68
69 c->num_chipselect = 1;
70 c->max_clk_rate = 50000000;
71
72 dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0));
73
74 if (c->tx_param) {
75 struct dw_dma_slave *slave = c->tx_param;
76
77 slave->dma_dev = &dma_dev->dev;
78 slave->m_master = 0;
79 slave->p_master = 1;
80 }
81
82 if (c->rx_param) {
83 struct dw_dma_slave *slave = c->rx_param;
84
85 slave->dma_dev = &dma_dev->dev;
86 slave->m_master = 0;
87 slave->p_master = 1;
88 }
89
90 c->dma_filter = lpss_dma_filter;
91 return 0;
92}
93
94static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
95{
96 switch (PCI_FUNC(dev->devfn)) {
97 case 0:
98 c->port_id = 3;
99 c->num_chipselect = 1;
100 break;
101 case 1:
102 c->port_id = 5;
103 c->num_chipselect = 4;
104 break;
105 case 2:
106 c->port_id = 6;
107 c->num_chipselect = 1;
108 break;
109 default:
110 return -ENODEV;
111 }
112 return 0;
113}
114
115static struct pxa_spi_info spi_info_configs[] = {
116 [PORT_CE4100] = {
117 .type = PXA25x_SSP,
118 .port_id = -1,
119 .num_chipselect = -1,
120 .max_clk_rate = 3686400,
121 },
122 [PORT_BYT] = {
123 .type = LPSS_BYT_SSP,
124 .port_id = 0,
125 .setup = lpss_spi_setup,
126 .tx_param = &byt_tx_param,
127 .rx_param = &byt_rx_param,
128 },
129 [PORT_BSW0] = {
130 .type = LPSS_BSW_SSP,
131 .port_id = 0,
132 .setup = lpss_spi_setup,
133 .tx_param = &bsw0_tx_param,
134 .rx_param = &bsw0_rx_param,
135 },
136 [PORT_BSW1] = {
137 .type = LPSS_BSW_SSP,
138 .port_id = 1,
139 .setup = lpss_spi_setup,
140 .tx_param = &bsw1_tx_param,
141 .rx_param = &bsw1_rx_param,
142 },
143 [PORT_BSW2] = {
144 .type = LPSS_BSW_SSP,
145 .port_id = 2,
146 .setup = lpss_spi_setup,
147 .tx_param = &bsw2_tx_param,
148 .rx_param = &bsw2_rx_param,
149 },
150 [PORT_MRFLD] = {
151 .type = PXA27x_SSP,
152 .max_clk_rate = 25000000,
153 .setup = mrfld_spi_setup,
154 },
155 [PORT_QUARK_X1000] = {
156 .type = QUARK_X1000_SSP,
157 .port_id = -1,
158 .num_chipselect = 1,
159 .max_clk_rate = 50000000,
160 },
161 [PORT_LPT] = {
162 .type = LPSS_LPT_SSP,
163 .port_id = 0,
164 .setup = lpss_spi_setup,
165 .tx_param = &lpt_tx_param,
166 .rx_param = &lpt_rx_param,
167 },
168};
169
170static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
171 const struct pci_device_id *ent)
172{
173 struct platform_device_info pi;
174 int ret;
175 struct platform_device *pdev;
176 struct pxa2xx_spi_master spi_pdata;
177 struct ssp_device *ssp;
178 struct pxa_spi_info *c;
179 char buf[40];
180
181 ret = pcim_enable_device(dev);
182 if (ret)
183 return ret;
184
185 ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
186 if (ret)
187 return ret;
188
189 c = &spi_info_configs[ent->driver_data];
190 if (c->setup) {
191 ret = c->setup(dev, c);
192 if (ret)
193 return ret;
194 }
195
196 memset(&spi_pdata, 0, sizeof(spi_pdata));
197 spi_pdata.num_chipselect = (c->num_chipselect > 0) ? c->num_chipselect : dev->devfn;
198 spi_pdata.dma_filter = c->dma_filter;
199 spi_pdata.tx_param = c->tx_param;
200 spi_pdata.rx_param = c->rx_param;
201 spi_pdata.enable_dma = c->rx_param && c->tx_param;
202
203 ssp = &spi_pdata.ssp;
204 ssp->phys_base = pci_resource_start(dev, 0);
205 ssp->mmio_base = pcim_iomap_table(dev)[0];
206 ssp->irq = dev->irq;
207 ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn;
208 ssp->type = c->type;
209
210 snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id);
211 ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, 0,
212 c->max_clk_rate);
213 if (IS_ERR(ssp->clk))
214 return PTR_ERR(ssp->clk);
215
216 memset(&pi, 0, sizeof(pi));
217 pi.fwnode = dev->dev.fwnode;
218 pi.parent = &dev->dev;
219 pi.name = "pxa2xx-spi";
220 pi.id = ssp->port_id;
221 pi.data = &spi_pdata;
222 pi.size_data = sizeof(spi_pdata);
223
224 pdev = platform_device_register_full(&pi);
225 if (IS_ERR(pdev)) {
226 clk_unregister(ssp->clk);
227 return PTR_ERR(pdev);
228 }
229
230 pci_set_drvdata(dev, pdev);
231
232 return 0;
233}
234
235static void pxa2xx_spi_pci_remove(struct pci_dev *dev)
236{
237 struct platform_device *pdev = pci_get_drvdata(dev);
238 struct pxa2xx_spi_master *spi_pdata;
239
240 spi_pdata = dev_get_platdata(&pdev->dev);
241
242 platform_device_unregister(pdev);
243 clk_unregister(spi_pdata->ssp.clk);
244}
245
246static const struct pci_device_id pxa2xx_spi_pci_devices[] = {
247 { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 },
248 { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT },
249 { PCI_VDEVICE(INTEL, 0x1194), PORT_MRFLD },
250 { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 },
251 { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 },
252 { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 },
253 { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 },
254 { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT },
255 { },
256};
257MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices);
258
259static struct pci_driver pxa2xx_spi_pci_driver = {
260 .name = "pxa2xx_spi_pci",
261 .id_table = pxa2xx_spi_pci_devices,
262 .probe = pxa2xx_spi_pci_probe,
263 .remove = pxa2xx_spi_pci_remove,
264};
265
266module_pci_driver(pxa2xx_spi_pci_driver);
267
268MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver");
269MODULE_LICENSE("GPL v2");
270MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>");