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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * driver for NXP USB Host devices
4 *
5 * Currently supported OHCI host devices:
6 * - NXP LPC32xx
7 *
8 * Authors: Dmitry Chigirev <source@mvista.com>
9 * Vitaly Wool <vitalywool@gmail.com>
10 *
11 * register initialization is based on code examples provided by Philips
12 * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
13 *
14 * NOTE: This driver does not have suspend/resume functionality
15 * This driver is intended for engineering development purposes only
16 *
17 * 2005-2006 (c) MontaVista Software, Inc.
18 */
19#include <linux/clk.h>
20#include <linux/dma-mapping.h>
21#include <linux/io.h>
22#include <linux/i2c.h>
23#include <linux/module.h>
24#include <linux/of.h>
25#include <linux/platform_device.h>
26#include <linux/usb/isp1301.h>
27#include <linux/usb.h>
28#include <linux/usb/hcd.h>
29
30#include "ohci.h"
31
32#define USB_CONFIG_BASE 0x31020000
33
34/* USB_OTG_STAT_CONTROL bit defines */
35#define TRANSPARENT_I2C_EN (1 << 7)
36#define HOST_EN (1 << 0)
37
38/* On LPC32xx, those are undefined */
39#ifndef start_int_set_falling_edge
40#define start_int_set_falling_edge(irq)
41#define start_int_set_rising_edge(irq)
42#define start_int_ack(irq)
43#define start_int_mask(irq)
44#define start_int_umask(irq)
45#endif
46
47#define DRIVER_DESC "OHCI NXP driver"
48
49static const char hcd_name[] = "ohci-nxp";
50static struct hc_driver __read_mostly ohci_nxp_hc_driver;
51
52static struct i2c_client *isp1301_i2c_client;
53
54static struct clk *usb_host_clk;
55
56static void isp1301_configure_lpc32xx(void)
57{
58 /* LPC32XX only supports DAT_SE0 USB mode */
59 /* This sequence is important */
60
61 /* Disable transparent UART mode first */
62 i2c_smbus_write_byte_data(isp1301_i2c_client,
63 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
64 MC1_UART_EN);
65 i2c_smbus_write_byte_data(isp1301_i2c_client,
66 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
67 ~MC1_SPEED_REG);
68 i2c_smbus_write_byte_data(isp1301_i2c_client,
69 ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
70 i2c_smbus_write_byte_data(isp1301_i2c_client,
71 (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
72 ~0);
73 i2c_smbus_write_byte_data(isp1301_i2c_client,
74 ISP1301_I2C_MODE_CONTROL_2,
75 (MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
76 i2c_smbus_write_byte_data(isp1301_i2c_client,
77 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
78 i2c_smbus_write_byte_data(isp1301_i2c_client,
79 ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
80 i2c_smbus_write_byte_data(isp1301_i2c_client,
81 ISP1301_I2C_OTG_CONTROL_1,
82 (OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
83 i2c_smbus_write_byte_data(isp1301_i2c_client,
84 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
85 (OTG1_DM_PULLUP | OTG1_DP_PULLUP));
86 i2c_smbus_write_byte_data(isp1301_i2c_client,
87 ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
88 i2c_smbus_write_byte_data(isp1301_i2c_client,
89 ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
90 ~0);
91 i2c_smbus_write_byte_data(isp1301_i2c_client,
92 ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
93
94 printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
95 i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
96 printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
97 i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
98 printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
99 i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
100}
101
102static void isp1301_configure(void)
103{
104 isp1301_configure_lpc32xx();
105}
106
107static inline void isp1301_vbus_on(void)
108{
109 i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
110 OTG1_VBUS_DRV);
111}
112
113static inline void isp1301_vbus_off(void)
114{
115 i2c_smbus_write_byte_data(isp1301_i2c_client,
116 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
117 OTG1_VBUS_DRV);
118}
119
120static void ohci_nxp_start_hc(void)
121{
122 void __iomem *usb_otg_stat_control = ioremap(USB_CONFIG_BASE + 0x110, 4);
123 unsigned long tmp;
124
125 if (WARN_ON(!usb_otg_stat_control))
126 return;
127
128 tmp = __raw_readl(usb_otg_stat_control) | HOST_EN;
129
130 __raw_writel(tmp, usb_otg_stat_control);
131 isp1301_vbus_on();
132
133 iounmap(usb_otg_stat_control);
134}
135
136static void ohci_nxp_stop_hc(void)
137{
138 void __iomem *usb_otg_stat_control = ioremap(USB_CONFIG_BASE + 0x110, 4);
139 unsigned long tmp;
140
141 if (WARN_ON(!usb_otg_stat_control))
142 return;
143
144 isp1301_vbus_off();
145 tmp = __raw_readl(usb_otg_stat_control) & ~HOST_EN;
146 __raw_writel(tmp, usb_otg_stat_control);
147
148 iounmap(usb_otg_stat_control);
149}
150
151static int ohci_hcd_nxp_probe(struct platform_device *pdev)
152{
153 struct usb_hcd *hcd = NULL;
154 const struct hc_driver *driver = &ohci_nxp_hc_driver;
155 struct resource *res;
156 int ret = 0, irq;
157 struct device_node *isp1301_node;
158
159 if (pdev->dev.of_node) {
160 isp1301_node = of_parse_phandle(pdev->dev.of_node,
161 "transceiver", 0);
162 } else {
163 isp1301_node = NULL;
164 }
165
166 isp1301_i2c_client = isp1301_get_client(isp1301_node);
167 of_node_put(isp1301_node);
168 if (!isp1301_i2c_client)
169 return -EPROBE_DEFER;
170
171 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
172 if (ret)
173 goto fail_disable;
174
175 dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
176 if (usb_disabled()) {
177 dev_err(&pdev->dev, "USB is disabled\n");
178 ret = -ENODEV;
179 goto fail_disable;
180 }
181
182 /* Enable USB host clock */
183 usb_host_clk = devm_clk_get(&pdev->dev, NULL);
184 if (IS_ERR(usb_host_clk)) {
185 dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
186 ret = PTR_ERR(usb_host_clk);
187 goto fail_disable;
188 }
189
190 ret = clk_prepare_enable(usb_host_clk);
191 if (ret < 0) {
192 dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
193 goto fail_disable;
194 }
195
196 isp1301_configure();
197
198 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
199 if (!hcd) {
200 dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
201 ret = -ENOMEM;
202 goto fail_hcd;
203 }
204
205 hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
206 if (IS_ERR(hcd->regs)) {
207 ret = PTR_ERR(hcd->regs);
208 goto fail_resource;
209 }
210 hcd->rsrc_start = res->start;
211 hcd->rsrc_len = resource_size(res);
212
213 irq = platform_get_irq(pdev, 0);
214 if (irq < 0) {
215 ret = -ENXIO;
216 goto fail_resource;
217 }
218
219 ohci_nxp_start_hc();
220 platform_set_drvdata(pdev, hcd);
221
222 dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
223 ret = usb_add_hcd(hcd, irq, 0);
224 if (ret == 0) {
225 device_wakeup_enable(hcd->self.controller);
226 return ret;
227 }
228
229 ohci_nxp_stop_hc();
230fail_resource:
231 usb_put_hcd(hcd);
232fail_hcd:
233 clk_disable_unprepare(usb_host_clk);
234fail_disable:
235 isp1301_i2c_client = NULL;
236 return ret;
237}
238
239static void ohci_hcd_nxp_remove(struct platform_device *pdev)
240{
241 struct usb_hcd *hcd = platform_get_drvdata(pdev);
242
243 usb_remove_hcd(hcd);
244 ohci_nxp_stop_hc();
245 usb_put_hcd(hcd);
246 clk_disable_unprepare(usb_host_clk);
247 isp1301_i2c_client = NULL;
248}
249
250/* work with hotplug and coldplug */
251MODULE_ALIAS("platform:usb-ohci");
252
253#ifdef CONFIG_OF
254static const struct of_device_id ohci_hcd_nxp_match[] = {
255 { .compatible = "nxp,ohci-nxp" },
256 {},
257};
258MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
259#endif
260
261static struct platform_driver ohci_hcd_nxp_driver = {
262 .driver = {
263 .name = "usb-ohci",
264 .of_match_table = of_match_ptr(ohci_hcd_nxp_match),
265 },
266 .probe = ohci_hcd_nxp_probe,
267 .remove_new = ohci_hcd_nxp_remove,
268};
269
270static int __init ohci_nxp_init(void)
271{
272 if (usb_disabled())
273 return -ENODEV;
274
275 ohci_init_driver(&ohci_nxp_hc_driver, NULL);
276 return platform_driver_register(&ohci_hcd_nxp_driver);
277}
278module_init(ohci_nxp_init);
279
280static void __exit ohci_nxp_cleanup(void)
281{
282 platform_driver_unregister(&ohci_hcd_nxp_driver);
283}
284module_exit(ohci_nxp_cleanup);
285
286MODULE_DESCRIPTION(DRIVER_DESC);
287MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * driver for NXP USB Host devices
4 *
5 * Currently supported OHCI host devices:
6 * - NXP LPC32xx
7 *
8 * Authors: Dmitry Chigirev <source@mvista.com>
9 * Vitaly Wool <vitalywool@gmail.com>
10 *
11 * register initialization is based on code examples provided by Philips
12 * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
13 *
14 * NOTE: This driver does not have suspend/resume functionality
15 * This driver is intended for engineering development purposes only
16 *
17 * 2005-2006 (c) MontaVista Software, Inc.
18 */
19#include <linux/clk.h>
20#include <linux/dma-mapping.h>
21#include <linux/io.h>
22#include <linux/i2c.h>
23#include <linux/module.h>
24#include <linux/of.h>
25#include <linux/platform_device.h>
26#include <linux/usb/isp1301.h>
27#include <linux/usb.h>
28#include <linux/usb/hcd.h>
29
30#include "ohci.h"
31
32#include <mach/hardware.h>
33
34#define USB_CONFIG_BASE 0x31020000
35#define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110)
36
37/* USB_OTG_STAT_CONTROL bit defines */
38#define TRANSPARENT_I2C_EN (1 << 7)
39#define HOST_EN (1 << 0)
40
41/* On LPC32xx, those are undefined */
42#ifndef start_int_set_falling_edge
43#define start_int_set_falling_edge(irq)
44#define start_int_set_rising_edge(irq)
45#define start_int_ack(irq)
46#define start_int_mask(irq)
47#define start_int_umask(irq)
48#endif
49
50#define DRIVER_DESC "OHCI NXP driver"
51
52static const char hcd_name[] = "ohci-nxp";
53static struct hc_driver __read_mostly ohci_nxp_hc_driver;
54
55static struct i2c_client *isp1301_i2c_client;
56
57static struct clk *usb_host_clk;
58
59static void isp1301_configure_lpc32xx(void)
60{
61 /* LPC32XX only supports DAT_SE0 USB mode */
62 /* This sequence is important */
63
64 /* Disable transparent UART mode first */
65 i2c_smbus_write_byte_data(isp1301_i2c_client,
66 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
67 MC1_UART_EN);
68 i2c_smbus_write_byte_data(isp1301_i2c_client,
69 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
70 ~MC1_SPEED_REG);
71 i2c_smbus_write_byte_data(isp1301_i2c_client,
72 ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
73 i2c_smbus_write_byte_data(isp1301_i2c_client,
74 (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
75 ~0);
76 i2c_smbus_write_byte_data(isp1301_i2c_client,
77 ISP1301_I2C_MODE_CONTROL_2,
78 (MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
79 i2c_smbus_write_byte_data(isp1301_i2c_client,
80 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
81 i2c_smbus_write_byte_data(isp1301_i2c_client,
82 ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
83 i2c_smbus_write_byte_data(isp1301_i2c_client,
84 ISP1301_I2C_OTG_CONTROL_1,
85 (OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
86 i2c_smbus_write_byte_data(isp1301_i2c_client,
87 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
88 (OTG1_DM_PULLUP | OTG1_DP_PULLUP));
89 i2c_smbus_write_byte_data(isp1301_i2c_client,
90 ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
91 i2c_smbus_write_byte_data(isp1301_i2c_client,
92 ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
93 ~0);
94 i2c_smbus_write_byte_data(isp1301_i2c_client,
95 ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
96
97 printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
98 i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
99 printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
100 i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
101 printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
102 i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
103}
104
105static void isp1301_configure(void)
106{
107 isp1301_configure_lpc32xx();
108}
109
110static inline void isp1301_vbus_on(void)
111{
112 i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
113 OTG1_VBUS_DRV);
114}
115
116static inline void isp1301_vbus_off(void)
117{
118 i2c_smbus_write_byte_data(isp1301_i2c_client,
119 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
120 OTG1_VBUS_DRV);
121}
122
123static void ohci_nxp_start_hc(void)
124{
125 unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
126
127 __raw_writel(tmp, USB_OTG_STAT_CONTROL);
128 isp1301_vbus_on();
129}
130
131static void ohci_nxp_stop_hc(void)
132{
133 unsigned long tmp;
134
135 isp1301_vbus_off();
136 tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
137 __raw_writel(tmp, USB_OTG_STAT_CONTROL);
138}
139
140static int ohci_hcd_nxp_probe(struct platform_device *pdev)
141{
142 struct usb_hcd *hcd = 0;
143 const struct hc_driver *driver = &ohci_nxp_hc_driver;
144 struct resource *res;
145 int ret = 0, irq;
146 struct device_node *isp1301_node;
147
148 if (pdev->dev.of_node) {
149 isp1301_node = of_parse_phandle(pdev->dev.of_node,
150 "transceiver", 0);
151 } else {
152 isp1301_node = NULL;
153 }
154
155 isp1301_i2c_client = isp1301_get_client(isp1301_node);
156 if (!isp1301_i2c_client)
157 return -EPROBE_DEFER;
158
159 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
160 if (ret)
161 goto fail_disable;
162
163 dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
164 if (usb_disabled()) {
165 dev_err(&pdev->dev, "USB is disabled\n");
166 ret = -ENODEV;
167 goto fail_disable;
168 }
169
170 /* Enable USB host clock */
171 usb_host_clk = devm_clk_get(&pdev->dev, NULL);
172 if (IS_ERR(usb_host_clk)) {
173 dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
174 ret = PTR_ERR(usb_host_clk);
175 goto fail_disable;
176 }
177
178 ret = clk_prepare_enable(usb_host_clk);
179 if (ret < 0) {
180 dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
181 goto fail_disable;
182 }
183
184 isp1301_configure();
185
186 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
187 if (!hcd) {
188 dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
189 ret = -ENOMEM;
190 goto fail_hcd;
191 }
192
193 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
194 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
195 if (IS_ERR(hcd->regs)) {
196 ret = PTR_ERR(hcd->regs);
197 goto fail_resource;
198 }
199 hcd->rsrc_start = res->start;
200 hcd->rsrc_len = resource_size(res);
201
202 irq = platform_get_irq(pdev, 0);
203 if (irq < 0) {
204 ret = -ENXIO;
205 goto fail_resource;
206 }
207
208 ohci_nxp_start_hc();
209 platform_set_drvdata(pdev, hcd);
210
211 dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
212 ret = usb_add_hcd(hcd, irq, 0);
213 if (ret == 0) {
214 device_wakeup_enable(hcd->self.controller);
215 return ret;
216 }
217
218 ohci_nxp_stop_hc();
219fail_resource:
220 usb_put_hcd(hcd);
221fail_hcd:
222 clk_disable_unprepare(usb_host_clk);
223fail_disable:
224 isp1301_i2c_client = NULL;
225 return ret;
226}
227
228static int ohci_hcd_nxp_remove(struct platform_device *pdev)
229{
230 struct usb_hcd *hcd = platform_get_drvdata(pdev);
231
232 usb_remove_hcd(hcd);
233 ohci_nxp_stop_hc();
234 usb_put_hcd(hcd);
235 clk_disable_unprepare(usb_host_clk);
236 isp1301_i2c_client = NULL;
237
238 return 0;
239}
240
241/* work with hotplug and coldplug */
242MODULE_ALIAS("platform:usb-ohci");
243
244#ifdef CONFIG_OF
245static const struct of_device_id ohci_hcd_nxp_match[] = {
246 { .compatible = "nxp,ohci-nxp" },
247 {},
248};
249MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
250#endif
251
252static struct platform_driver ohci_hcd_nxp_driver = {
253 .driver = {
254 .name = "usb-ohci",
255 .of_match_table = of_match_ptr(ohci_hcd_nxp_match),
256 },
257 .probe = ohci_hcd_nxp_probe,
258 .remove = ohci_hcd_nxp_remove,
259};
260
261static int __init ohci_nxp_init(void)
262{
263 if (usb_disabled())
264 return -ENODEV;
265
266 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
267
268 ohci_init_driver(&ohci_nxp_hc_driver, NULL);
269 return platform_driver_register(&ohci_hcd_nxp_driver);
270}
271module_init(ohci_nxp_init);
272
273static void __exit ohci_nxp_cleanup(void)
274{
275 platform_driver_unregister(&ohci_hcd_nxp_driver);
276}
277module_exit(ohci_nxp_cleanup);
278
279MODULE_DESCRIPTION(DRIVER_DESC);
280MODULE_LICENSE("GPL v2");