Loading...
1/*
2 * Glue code for the ISP1760 driver and bus
3 * Currently there is support for
4 * - OpenFirmware
5 * - PCI
6 * - PDEV (generic platform device centralized driver model)
7 *
8 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
9 *
10 */
11
12#include <linux/usb.h>
13#include <linux/io.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/platform_device.h>
17#include <linux/slab.h>
18#include <linux/usb/isp1760.h>
19#include <linux/usb/hcd.h>
20
21#include "isp1760-core.h"
22#include "isp1760-regs.h"
23
24#ifdef CONFIG_PCI
25#include <linux/pci.h>
26#endif
27
28#ifdef CONFIG_PCI
29static int isp1761_pci_init(struct pci_dev *dev)
30{
31 resource_size_t mem_start;
32 resource_size_t mem_length;
33 u8 __iomem *iobase;
34 u8 latency, limit;
35 int retry_count;
36 u32 reg_data;
37
38 /* Grab the PLX PCI shared memory of the ISP 1761 we need */
39 mem_start = pci_resource_start(dev, 3);
40 mem_length = pci_resource_len(dev, 3);
41 if (mem_length < 0xffff) {
42 printk(KERN_ERR "memory length for this resource is wrong\n");
43 return -ENOMEM;
44 }
45
46 if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) {
47 printk(KERN_ERR "host controller already in use\n");
48 return -EBUSY;
49 }
50
51 /* map available memory */
52 iobase = ioremap_nocache(mem_start, mem_length);
53 if (!iobase) {
54 printk(KERN_ERR "Error ioremap failed\n");
55 release_mem_region(mem_start, mem_length);
56 return -ENOMEM;
57 }
58
59 /* bad pci latencies can contribute to overruns */
60 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
61 if (latency) {
62 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
63 if (limit && limit < latency)
64 pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
65 }
66
67 /* Try to check whether we can access Scratch Register of
68 * Host Controller or not. The initial PCI access is retried until
69 * local init for the PCI bridge is completed
70 */
71 retry_count = 20;
72 reg_data = 0;
73 while ((reg_data != 0xFACE) && retry_count) {
74 /*by default host is in 16bit mode, so
75 * io operations at this stage must be 16 bit
76 * */
77 writel(0xface, iobase + HC_SCRATCH_REG);
78 udelay(100);
79 reg_data = readl(iobase + HC_SCRATCH_REG) & 0x0000ffff;
80 retry_count--;
81 }
82
83 iounmap(iobase);
84 release_mem_region(mem_start, mem_length);
85
86 /* Host Controller presence is detected by writing to scratch register
87 * and reading back and checking the contents are same or not
88 */
89 if (reg_data != 0xFACE) {
90 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
91 return -ENOMEM;
92 }
93
94 /* Grab the PLX PCI mem maped port start address we need */
95 mem_start = pci_resource_start(dev, 0);
96 mem_length = pci_resource_len(dev, 0);
97
98 if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) {
99 printk(KERN_ERR "request region #1\n");
100 return -EBUSY;
101 }
102
103 iobase = ioremap_nocache(mem_start, mem_length);
104 if (!iobase) {
105 printk(KERN_ERR "ioremap #1\n");
106 release_mem_region(mem_start, mem_length);
107 return -ENOMEM;
108 }
109
110 /* configure PLX PCI chip to pass interrupts */
111#define PLX_INT_CSR_REG 0x68
112 reg_data = readl(iobase + PLX_INT_CSR_REG);
113 reg_data |= 0x900;
114 writel(reg_data, iobase + PLX_INT_CSR_REG);
115
116 /* done with PLX IO access */
117 iounmap(iobase);
118 release_mem_region(mem_start, mem_length);
119
120 return 0;
121}
122
123static int isp1761_pci_probe(struct pci_dev *dev,
124 const struct pci_device_id *id)
125{
126 unsigned int devflags = 0;
127 int ret;
128
129 if (!dev->irq)
130 return -ENODEV;
131
132 if (pci_enable_device(dev) < 0)
133 return -ENODEV;
134
135 ret = isp1761_pci_init(dev);
136 if (ret < 0)
137 goto error;
138
139 pci_set_master(dev);
140
141 dev->dev.dma_mask = NULL;
142 ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev,
143 devflags);
144 if (ret < 0)
145 goto error;
146
147 return 0;
148
149error:
150 pci_disable_device(dev);
151 return ret;
152}
153
154static void isp1761_pci_remove(struct pci_dev *dev)
155{
156 isp1760_unregister(&dev->dev);
157
158 pci_disable_device(dev);
159}
160
161static void isp1761_pci_shutdown(struct pci_dev *dev)
162{
163 printk(KERN_ERR "ips1761_pci_shutdown\n");
164}
165
166static const struct pci_device_id isp1760_plx [] = {
167 {
168 .class = PCI_CLASS_BRIDGE_OTHER << 8,
169 .class_mask = ~0,
170 .vendor = PCI_VENDOR_ID_PLX,
171 .device = 0x5406,
172 .subvendor = PCI_VENDOR_ID_PLX,
173 .subdevice = 0x9054,
174 },
175 { }
176};
177MODULE_DEVICE_TABLE(pci, isp1760_plx);
178
179static struct pci_driver isp1761_pci_driver = {
180 .name = "isp1760",
181 .id_table = isp1760_plx,
182 .probe = isp1761_pci_probe,
183 .remove = isp1761_pci_remove,
184 .shutdown = isp1761_pci_shutdown,
185};
186#endif
187
188static int isp1760_plat_probe(struct platform_device *pdev)
189{
190 unsigned long irqflags;
191 unsigned int devflags = 0;
192 struct resource *mem_res;
193 struct resource *irq_res;
194 int ret;
195
196 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
197
198 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
199 if (!irq_res) {
200 pr_warning("isp1760: IRQ resource not available\n");
201 return -ENODEV;
202 }
203 irqflags = irq_res->flags & IRQF_TRIGGER_MASK;
204
205 if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
206 struct device_node *dp = pdev->dev.of_node;
207 u32 bus_width = 0;
208
209 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
210 devflags |= ISP1760_FLAG_ISP1761;
211
212 /* Some systems wire up only 16 of the 32 data lines */
213 of_property_read_u32(dp, "bus-width", &bus_width);
214 if (bus_width == 16)
215 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
216
217 if (of_property_read_bool(dp, "port1-otg"))
218 devflags |= ISP1760_FLAG_OTG_EN;
219
220 if (of_property_read_bool(dp, "analog-oc"))
221 devflags |= ISP1760_FLAG_ANALOG_OC;
222
223 if (of_property_read_bool(dp, "dack-polarity"))
224 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
225
226 if (of_property_read_bool(dp, "dreq-polarity"))
227 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
228 } else if (dev_get_platdata(&pdev->dev)) {
229 struct isp1760_platform_data *pdata =
230 dev_get_platdata(&pdev->dev);
231
232 if (pdata->is_isp1761)
233 devflags |= ISP1760_FLAG_ISP1761;
234 if (pdata->bus_width_16)
235 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
236 if (pdata->port1_otg)
237 devflags |= ISP1760_FLAG_OTG_EN;
238 if (pdata->analog_oc)
239 devflags |= ISP1760_FLAG_ANALOG_OC;
240 if (pdata->dack_polarity_high)
241 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
242 if (pdata->dreq_polarity_high)
243 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
244 }
245
246 ret = isp1760_register(mem_res, irq_res->start, irqflags, &pdev->dev,
247 devflags);
248 if (ret < 0)
249 return ret;
250
251 pr_info("ISP1760 USB device initialised\n");
252 return 0;
253}
254
255static int isp1760_plat_remove(struct platform_device *pdev)
256{
257 isp1760_unregister(&pdev->dev);
258
259 return 0;
260}
261
262#ifdef CONFIG_OF
263static const struct of_device_id isp1760_of_match[] = {
264 { .compatible = "nxp,usb-isp1760", },
265 { .compatible = "nxp,usb-isp1761", },
266 { },
267};
268MODULE_DEVICE_TABLE(of, isp1760_of_match);
269#endif
270
271static struct platform_driver isp1760_plat_driver = {
272 .probe = isp1760_plat_probe,
273 .remove = isp1760_plat_remove,
274 .driver = {
275 .name = "isp1760",
276 .of_match_table = of_match_ptr(isp1760_of_match),
277 },
278};
279
280static int __init isp1760_init(void)
281{
282 int ret, any_ret = -ENODEV;
283
284 isp1760_init_kmem_once();
285
286 ret = platform_driver_register(&isp1760_plat_driver);
287 if (!ret)
288 any_ret = 0;
289#ifdef CONFIG_PCI
290 ret = pci_register_driver(&isp1761_pci_driver);
291 if (!ret)
292 any_ret = 0;
293#endif
294
295 if (any_ret)
296 isp1760_deinit_kmem_cache();
297 return any_ret;
298}
299module_init(isp1760_init);
300
301static void __exit isp1760_exit(void)
302{
303 platform_driver_unregister(&isp1760_plat_driver);
304#ifdef CONFIG_PCI
305 pci_unregister_driver(&isp1761_pci_driver);
306#endif
307 isp1760_deinit_kmem_cache();
308}
309module_exit(isp1760_exit);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Glue code for the ISP1760 driver and bus
4 * Currently there is support for
5 * - OpenFirmware
6 * - PCI
7 * - PDEV (generic platform device centralized driver model)
8 *
9 * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
10 * Copyright 2021 Linaro, Rui Miguel Silva <rui.silva@linaro.org>
11 *
12 */
13
14#include <linux/usb.h>
15#include <linux/io.h>
16#include <linux/irq.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/platform_device.h>
20#include <linux/slab.h>
21#include <linux/usb/hcd.h>
22#include <linux/usb/otg.h>
23
24#include "isp1760-core.h"
25#include "isp1760-regs.h"
26
27#ifdef CONFIG_USB_PCI
28#include <linux/pci.h>
29#endif
30
31#ifdef CONFIG_USB_PCI
32static int isp1761_pci_init(struct pci_dev *dev)
33{
34 resource_size_t mem_start;
35 resource_size_t mem_length;
36 u8 __iomem *iobase;
37 u8 latency, limit;
38 int retry_count;
39 u32 reg_data;
40
41 /* Grab the PLX PCI shared memory of the ISP 1761 we need */
42 mem_start = pci_resource_start(dev, 3);
43 mem_length = pci_resource_len(dev, 3);
44 if (mem_length < 0xffff) {
45 printk(KERN_ERR "memory length for this resource is wrong\n");
46 return -ENOMEM;
47 }
48
49 if (!request_mem_region(mem_start, mem_length, "ISP-PCI")) {
50 printk(KERN_ERR "host controller already in use\n");
51 return -EBUSY;
52 }
53
54 /* map available memory */
55 iobase = ioremap(mem_start, mem_length);
56 if (!iobase) {
57 printk(KERN_ERR "Error ioremap failed\n");
58 release_mem_region(mem_start, mem_length);
59 return -ENOMEM;
60 }
61
62 /* bad pci latencies can contribute to overruns */
63 pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
64 if (latency) {
65 pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
66 if (limit && limit < latency)
67 pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
68 }
69
70 /* Try to check whether we can access Scratch Register of
71 * Host Controller or not. The initial PCI access is retried until
72 * local init for the PCI bridge is completed
73 */
74 retry_count = 20;
75 reg_data = 0;
76 while ((reg_data != 0xFACE) && retry_count) {
77 /*by default host is in 16bit mode, so
78 * io operations at this stage must be 16 bit
79 * */
80 writel(0xface, iobase + ISP176x_HC_SCRATCH);
81 udelay(100);
82 reg_data = readl(iobase + ISP176x_HC_SCRATCH) & 0x0000ffff;
83 retry_count--;
84 }
85
86 iounmap(iobase);
87 release_mem_region(mem_start, mem_length);
88
89 /* Host Controller presence is detected by writing to scratch register
90 * and reading back and checking the contents are same or not
91 */
92 if (reg_data != 0xFACE) {
93 dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
94 return -ENOMEM;
95 }
96
97 /* Grab the PLX PCI mem maped port start address we need */
98 mem_start = pci_resource_start(dev, 0);
99 mem_length = pci_resource_len(dev, 0);
100
101 if (!request_mem_region(mem_start, mem_length, "ISP1761 IO MEM")) {
102 printk(KERN_ERR "request region #1\n");
103 return -EBUSY;
104 }
105
106 iobase = ioremap(mem_start, mem_length);
107 if (!iobase) {
108 printk(KERN_ERR "ioremap #1\n");
109 release_mem_region(mem_start, mem_length);
110 return -ENOMEM;
111 }
112
113 /* configure PLX PCI chip to pass interrupts */
114#define PLX_INT_CSR_REG 0x68
115 reg_data = readl(iobase + PLX_INT_CSR_REG);
116 reg_data |= 0x900;
117 writel(reg_data, iobase + PLX_INT_CSR_REG);
118
119 /* done with PLX IO access */
120 iounmap(iobase);
121 release_mem_region(mem_start, mem_length);
122
123 return 0;
124}
125
126static int isp1761_pci_probe(struct pci_dev *dev,
127 const struct pci_device_id *id)
128{
129 unsigned int devflags = 0;
130 int ret;
131
132 if (!dev->irq)
133 return -ENODEV;
134
135 if (pci_enable_device(dev) < 0)
136 return -ENODEV;
137
138 ret = isp1761_pci_init(dev);
139 if (ret < 0)
140 goto error;
141
142 pci_set_master(dev);
143
144 ret = isp1760_register(&dev->resource[3], dev->irq, 0, &dev->dev,
145 devflags);
146 if (ret < 0)
147 goto error;
148
149 return 0;
150
151error:
152 pci_disable_device(dev);
153 return ret;
154}
155
156static void isp1761_pci_remove(struct pci_dev *dev)
157{
158 isp1760_unregister(&dev->dev);
159
160 pci_disable_device(dev);
161}
162
163static void isp1761_pci_shutdown(struct pci_dev *dev)
164{
165 printk(KERN_ERR "ips1761_pci_shutdown\n");
166}
167
168static const struct pci_device_id isp1760_plx[] = {
169 {
170 .class = PCI_CLASS_BRIDGE_OTHER << 8,
171 .class_mask = ~0,
172 .vendor = PCI_VENDOR_ID_PLX,
173 .device = 0x5406,
174 .subvendor = PCI_VENDOR_ID_PLX,
175 .subdevice = 0x9054,
176 },
177 { }
178};
179MODULE_DEVICE_TABLE(pci, isp1760_plx);
180
181static struct pci_driver isp1761_pci_driver = {
182 .name = "isp1760",
183 .id_table = isp1760_plx,
184 .probe = isp1761_pci_probe,
185 .remove = isp1761_pci_remove,
186 .shutdown = isp1761_pci_shutdown,
187};
188#endif
189
190static int isp1760_plat_probe(struct platform_device *pdev)
191{
192 unsigned long irqflags;
193 unsigned int devflags = 0;
194 struct resource *mem_res;
195 int irq;
196 int ret;
197
198 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
199
200 irq = platform_get_irq(pdev, 0);
201 if (irq < 0)
202 return irq;
203 irqflags = irq_get_trigger_type(irq);
204
205 if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
206 struct device_node *dp = pdev->dev.of_node;
207 u32 bus_width = 0;
208
209 if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
210 devflags |= ISP1760_FLAG_ISP1761;
211
212 if (of_device_is_compatible(dp, "nxp,usb-isp1763"))
213 devflags |= ISP1760_FLAG_ISP1763;
214
215 /*
216 * Some systems wire up only 8 of 16 data lines or
217 * 16 of the 32 data lines
218 */
219 of_property_read_u32(dp, "bus-width", &bus_width);
220 if (bus_width == 16)
221 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
222 else if (bus_width == 8)
223 devflags |= ISP1760_FLAG_BUS_WIDTH_8;
224
225 if (usb_get_dr_mode(&pdev->dev) == USB_DR_MODE_PERIPHERAL)
226 devflags |= ISP1760_FLAG_PERIPHERAL_EN;
227
228 if (of_property_read_bool(dp, "analog-oc"))
229 devflags |= ISP1760_FLAG_ANALOG_OC;
230
231 if (of_property_read_bool(dp, "dack-polarity"))
232 devflags |= ISP1760_FLAG_DACK_POL_HIGH;
233
234 if (of_property_read_bool(dp, "dreq-polarity"))
235 devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
236 } else {
237 pr_err("isp1760: no platform data\n");
238 return -ENXIO;
239 }
240
241 ret = isp1760_register(mem_res, irq, irqflags, &pdev->dev, devflags);
242 if (ret < 0)
243 return ret;
244
245 pr_info("ISP1760 USB device initialised\n");
246 return 0;
247}
248
249static void isp1760_plat_remove(struct platform_device *pdev)
250{
251 isp1760_unregister(&pdev->dev);
252}
253
254#ifdef CONFIG_OF
255static const struct of_device_id isp1760_of_match[] = {
256 { .compatible = "nxp,usb-isp1760", },
257 { .compatible = "nxp,usb-isp1761", },
258 { .compatible = "nxp,usb-isp1763", },
259 { },
260};
261MODULE_DEVICE_TABLE(of, isp1760_of_match);
262#endif
263
264static struct platform_driver isp1760_plat_driver = {
265 .probe = isp1760_plat_probe,
266 .remove_new = isp1760_plat_remove,
267 .driver = {
268 .name = "isp1760",
269 .of_match_table = of_match_ptr(isp1760_of_match),
270 },
271};
272
273static int __init isp1760_init(void)
274{
275 int ret, any_ret = -ENODEV;
276
277 isp1760_init_kmem_once();
278
279 ret = platform_driver_register(&isp1760_plat_driver);
280 if (!ret)
281 any_ret = 0;
282#ifdef CONFIG_USB_PCI
283 ret = pci_register_driver(&isp1761_pci_driver);
284 if (!ret)
285 any_ret = 0;
286#endif
287
288 if (any_ret)
289 isp1760_deinit_kmem_cache();
290 return any_ret;
291}
292module_init(isp1760_init);
293
294static void __exit isp1760_exit(void)
295{
296 platform_driver_unregister(&isp1760_plat_driver);
297#ifdef CONFIG_USB_PCI
298 pci_unregister_driver(&isp1761_pci_driver);
299#endif
300 isp1760_deinit_kmem_cache();
301}
302module_exit(isp1760_exit);