Commit | Line | Data |
---|---|---|
d6ea3df0 SAS |
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> | |
d7614de4 | 8 | #include <linux/module.h> |
d6ea3df0 | 9 | #include <linux/spi/pxa2xx_spi.h> |
afa93c90 | 10 | #include <linux/clk-provider.h> |
d6ea3df0 | 11 | |
b729bf34 MW |
12 | #include <linux/dmaengine.h> |
13 | #include <linux/platform_data/dma-dw.h> | |
14 | ||
d6ba32d5 CCE |
15 | enum { |
16 | PORT_CE4100, | |
17 | PORT_BYT, | |
39d36536 MW |
18 | PORT_BSW0, |
19 | PORT_BSW1, | |
20 | PORT_BSW2, | |
e5262d05 | 21 | PORT_QUARK_X1000, |
caba248d | 22 | PORT_LPT, |
d6ba32d5 CCE |
23 | }; |
24 | ||
25 | struct pxa_spi_info { | |
26 | enum pxa_ssp_type type; | |
27 | int port_id; | |
28 | int num_chipselect; | |
afa93c90 | 29 | unsigned long max_clk_rate; |
b729bf34 MW |
30 | |
31 | /* DMA channel request parameters */ | |
32 | void *tx_param; | |
33 | void *rx_param; | |
d6ba32d5 CCE |
34 | }; |
35 | ||
b729bf34 MW |
36 | static struct dw_dma_slave byt_tx_param = { .dst_id = 0 }; |
37 | static struct dw_dma_slave byt_rx_param = { .src_id = 1 }; | |
38 | ||
39d36536 MW |
39 | static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 }; |
40 | static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 }; | |
41 | static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 }; | |
42 | static struct dw_dma_slave bsw1_rx_param = { .src_id = 7 }; | |
43 | static struct dw_dma_slave bsw2_tx_param = { .dst_id = 8 }; | |
44 | static struct dw_dma_slave bsw2_rx_param = { .src_id = 9 }; | |
45 | ||
caba248d LL |
46 | static struct dw_dma_slave lpt_tx_param = { .dst_id = 0 }; |
47 | static struct dw_dma_slave lpt_rx_param = { .src_id = 1 }; | |
48 | ||
b729bf34 MW |
49 | static bool lpss_dma_filter(struct dma_chan *chan, void *param) |
50 | { | |
51 | struct dw_dma_slave *dws = param; | |
52 | ||
53 | if (dws->dma_dev != chan->device->dev) | |
54 | return false; | |
55 | ||
56 | chan->private = dws; | |
57 | return true; | |
58 | } | |
59 | ||
d6ba32d5 CCE |
60 | static struct pxa_spi_info spi_info_configs[] = { |
61 | [PORT_CE4100] = { | |
62 | .type = PXA25x_SSP, | |
63 | .port_id = -1, | |
64 | .num_chipselect = -1, | |
afa93c90 | 65 | .max_clk_rate = 3686400, |
d6ba32d5 CCE |
66 | }, |
67 | [PORT_BYT] = { | |
03fbf488 | 68 | .type = LPSS_BYT_SSP, |
d6ba32d5 CCE |
69 | .port_id = 0, |
70 | .num_chipselect = 1, | |
afa93c90 | 71 | .max_clk_rate = 50000000, |
b729bf34 MW |
72 | .tx_param = &byt_tx_param, |
73 | .rx_param = &byt_rx_param, | |
d6ba32d5 | 74 | }, |
39d36536 | 75 | [PORT_BSW0] = { |
03fbf488 | 76 | .type = LPSS_BYT_SSP, |
39d36536 MW |
77 | .port_id = 0, |
78 | .num_chipselect = 1, | |
79 | .max_clk_rate = 50000000, | |
80 | .tx_param = &bsw0_tx_param, | |
81 | .rx_param = &bsw0_rx_param, | |
82 | }, | |
83 | [PORT_BSW1] = { | |
03fbf488 | 84 | .type = LPSS_BYT_SSP, |
39d36536 MW |
85 | .port_id = 1, |
86 | .num_chipselect = 1, | |
87 | .max_clk_rate = 50000000, | |
88 | .tx_param = &bsw1_tx_param, | |
89 | .rx_param = &bsw1_rx_param, | |
90 | }, | |
91 | [PORT_BSW2] = { | |
03fbf488 | 92 | .type = LPSS_BYT_SSP, |
39d36536 MW |
93 | .port_id = 2, |
94 | .num_chipselect = 1, | |
95 | .max_clk_rate = 50000000, | |
96 | .tx_param = &bsw2_tx_param, | |
97 | .rx_param = &bsw2_rx_param, | |
d6ba32d5 | 98 | }, |
e5262d05 WC |
99 | [PORT_QUARK_X1000] = { |
100 | .type = QUARK_X1000_SSP, | |
101 | .port_id = -1, | |
102 | .num_chipselect = 1, | |
103 | .max_clk_rate = 50000000, | |
104 | }, | |
caba248d LL |
105 | [PORT_LPT] = { |
106 | .type = LPSS_LPT_SSP, | |
107 | .port_id = 0, | |
108 | .num_chipselect = 1, | |
109 | .max_clk_rate = 50000000, | |
110 | .tx_param = &lpt_tx_param, | |
111 | .rx_param = &lpt_rx_param, | |
112 | }, | |
d6ba32d5 CCE |
113 | }; |
114 | ||
115 | static int pxa2xx_spi_pci_probe(struct pci_dev *dev, | |
d6ea3df0 SAS |
116 | const struct pci_device_id *ent) |
117 | { | |
0202775b | 118 | struct platform_device_info pi; |
d6ea3df0 | 119 | int ret; |
d6ea3df0 | 120 | struct platform_device *pdev; |
0f3e1d27 | 121 | struct pxa2xx_spi_master spi_pdata; |
d6ea3df0 | 122 | struct ssp_device *ssp; |
d6ba32d5 | 123 | struct pxa_spi_info *c; |
afa93c90 | 124 | char buf[40]; |
b729bf34 | 125 | struct pci_dev *dma_dev; |
d6ea3df0 | 126 | |
0202775b | 127 | ret = pcim_enable_device(dev); |
d6ea3df0 SAS |
128 | if (ret) |
129 | return ret; | |
130 | ||
0202775b | 131 | ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI"); |
c1346340 | 132 | if (ret) |
d6ea3df0 | 133 | return ret; |
d6ea3df0 | 134 | |
d6ba32d5 CCE |
135 | c = &spi_info_configs[ent->driver_data]; |
136 | ||
0f3e1d27 | 137 | memset(&spi_pdata, 0, sizeof(spi_pdata)); |
d6ba32d5 CCE |
138 | spi_pdata.num_chipselect = (c->num_chipselect > 0) ? |
139 | c->num_chipselect : dev->devfn; | |
b729bf34 MW |
140 | |
141 | dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0)); | |
142 | ||
143 | if (c->tx_param) { | |
144 | struct dw_dma_slave *slave = c->tx_param; | |
145 | ||
146 | slave->dma_dev = &dma_dev->dev; | |
c422025c AS |
147 | slave->m_master = 0; |
148 | slave->p_master = 1; | |
b729bf34 MW |
149 | } |
150 | ||
151 | if (c->rx_param) { | |
152 | struct dw_dma_slave *slave = c->rx_param; | |
153 | ||
154 | slave->dma_dev = &dma_dev->dev; | |
c422025c AS |
155 | slave->m_master = 0; |
156 | slave->p_master = 1; | |
b729bf34 MW |
157 | } |
158 | ||
159 | spi_pdata.dma_filter = lpss_dma_filter; | |
160 | spi_pdata.tx_param = c->tx_param; | |
161 | spi_pdata.rx_param = c->rx_param; | |
162 | spi_pdata.enable_dma = c->rx_param && c->tx_param; | |
d6ea3df0 | 163 | |
851bacf5 | 164 | ssp = &spi_pdata.ssp; |
d6ea3df0 | 165 | ssp->phys_base = pci_resource_start(dev, 0); |
0202775b | 166 | ssp->mmio_base = pcim_iomap_table(dev)[0]; |
d6ea3df0 | 167 | if (!ssp->mmio_base) { |
0202775b MW |
168 | dev_err(&dev->dev, "failed to ioremap() registers\n"); |
169 | return -EIO; | |
d6ea3df0 SAS |
170 | } |
171 | ssp->irq = dev->irq; | |
d6ba32d5 CCE |
172 | ssp->port_id = (c->port_id >= 0) ? c->port_id : dev->devfn; |
173 | ssp->type = c->type; | |
d6ea3df0 | 174 | |
afa93c90 CCE |
175 | snprintf(buf, sizeof(buf), "pxa2xx-spi.%d", ssp->port_id); |
176 | ssp->clk = clk_register_fixed_rate(&dev->dev, buf , NULL, | |
177 | CLK_IS_ROOT, c->max_clk_rate); | |
178 | if (IS_ERR(ssp->clk)) | |
179 | return PTR_ERR(ssp->clk); | |
180 | ||
0202775b MW |
181 | memset(&pi, 0, sizeof(pi)); |
182 | pi.parent = &dev->dev; | |
183 | pi.name = "pxa2xx-spi"; | |
184 | pi.id = ssp->port_id; | |
185 | pi.data = &spi_pdata; | |
186 | pi.size_data = sizeof(spi_pdata); | |
d6ea3df0 | 187 | |
0202775b | 188 | pdev = platform_device_register_full(&pi); |
afa93c90 CCE |
189 | if (IS_ERR(pdev)) { |
190 | clk_unregister(ssp->clk); | |
d77b5382 | 191 | return PTR_ERR(pdev); |
afa93c90 | 192 | } |
d6ea3df0 | 193 | |
851bacf5 | 194 | pci_set_drvdata(dev, pdev); |
d6ea3df0 | 195 | |
0202775b | 196 | return 0; |
d6ea3df0 SAS |
197 | } |
198 | ||
d6ba32d5 | 199 | static void pxa2xx_spi_pci_remove(struct pci_dev *dev) |
d6ea3df0 | 200 | { |
851bacf5 | 201 | struct platform_device *pdev = pci_get_drvdata(dev); |
afa93c90 CCE |
202 | struct pxa2xx_spi_master *spi_pdata; |
203 | ||
204 | spi_pdata = dev_get_platdata(&pdev->dev); | |
d6ea3df0 | 205 | |
851bacf5 | 206 | platform_device_unregister(pdev); |
afa93c90 | 207 | clk_unregister(spi_pdata->ssp.clk); |
d6ea3df0 SAS |
208 | } |
209 | ||
d6ba32d5 CCE |
210 | static const struct pci_device_id pxa2xx_spi_pci_devices[] = { |
211 | { PCI_VDEVICE(INTEL, 0x2e6a), PORT_CE4100 }, | |
e5262d05 | 212 | { PCI_VDEVICE(INTEL, 0x0935), PORT_QUARK_X1000 }, |
d6ba32d5 | 213 | { PCI_VDEVICE(INTEL, 0x0f0e), PORT_BYT }, |
39d36536 MW |
214 | { PCI_VDEVICE(INTEL, 0x228e), PORT_BSW0 }, |
215 | { PCI_VDEVICE(INTEL, 0x2290), PORT_BSW1 }, | |
216 | { PCI_VDEVICE(INTEL, 0x22ac), PORT_BSW2 }, | |
caba248d | 217 | { PCI_VDEVICE(INTEL, 0x9ce6), PORT_LPT }, |
d6ea3df0 SAS |
218 | { }, |
219 | }; | |
d6ba32d5 | 220 | MODULE_DEVICE_TABLE(pci, pxa2xx_spi_pci_devices); |
d6ea3df0 | 221 | |
d6ba32d5 CCE |
222 | static struct pci_driver pxa2xx_spi_pci_driver = { |
223 | .name = "pxa2xx_spi_pci", | |
224 | .id_table = pxa2xx_spi_pci_devices, | |
225 | .probe = pxa2xx_spi_pci_probe, | |
226 | .remove = pxa2xx_spi_pci_remove, | |
d6ea3df0 SAS |
227 | }; |
228 | ||
d6ba32d5 | 229 | module_pci_driver(pxa2xx_spi_pci_driver); |
d6ea3df0 | 230 | |
d6ba32d5 | 231 | MODULE_DESCRIPTION("CE4100/LPSS PCI-SPI glue code for PXA's driver"); |
d6ea3df0 SAS |
232 | MODULE_LICENSE("GPL v2"); |
233 | MODULE_AUTHOR("Sebastian Andrzej Siewior <bigeasy@linutronix.de>"); |