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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#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");
1/*
2 * driver for NXP USB Host devices
3 *
4 * Currently supported OHCI host devices:
5 * - NXP LPC32xx
6 *
7 * Authors: Dmitry Chigirev <source@mvista.com>
8 * Vitaly Wool <vitalywool@gmail.com>
9 *
10 * register initialization is based on code examples provided by Philips
11 * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
12 *
13 * NOTE: This driver does not have suspend/resume functionality
14 * This driver is intended for engineering development purposes only
15 *
16 * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
17 * the terms of the GNU General Public License version 2. This program
18 * is licensed "as is" without any warranty of any kind, whether express
19 * or implied.
20 */
21#include <linux/clk.h>
22#include <linux/dma-mapping.h>
23#include <linux/io.h>
24#include <linux/i2c.h>
25#include <linux/module.h>
26#include <linux/of.h>
27#include <linux/platform_device.h>
28#include <linux/usb/isp1301.h>
29#include <linux/usb.h>
30#include <linux/usb/hcd.h>
31
32#include "ohci.h"
33
34#include <mach/hardware.h>
35
36#define USB_CONFIG_BASE 0x31020000
37#define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110)
38
39/* USB_OTG_STAT_CONTROL bit defines */
40#define TRANSPARENT_I2C_EN (1 << 7)
41#define HOST_EN (1 << 0)
42
43/* On LPC32xx, those are undefined */
44#ifndef start_int_set_falling_edge
45#define start_int_set_falling_edge(irq)
46#define start_int_set_rising_edge(irq)
47#define start_int_ack(irq)
48#define start_int_mask(irq)
49#define start_int_umask(irq)
50#endif
51
52#define DRIVER_DESC "OHCI NXP driver"
53
54static const char hcd_name[] = "ohci-nxp";
55static struct hc_driver __read_mostly ohci_nxp_hc_driver;
56
57static struct i2c_client *isp1301_i2c_client;
58
59static struct clk *usb_host_clk;
60
61static void isp1301_configure_lpc32xx(void)
62{
63 /* LPC32XX only supports DAT_SE0 USB mode */
64 /* This sequence is important */
65
66 /* Disable transparent UART mode first */
67 i2c_smbus_write_byte_data(isp1301_i2c_client,
68 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
69 MC1_UART_EN);
70 i2c_smbus_write_byte_data(isp1301_i2c_client,
71 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
72 ~MC1_SPEED_REG);
73 i2c_smbus_write_byte_data(isp1301_i2c_client,
74 ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
75 i2c_smbus_write_byte_data(isp1301_i2c_client,
76 (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
77 ~0);
78 i2c_smbus_write_byte_data(isp1301_i2c_client,
79 ISP1301_I2C_MODE_CONTROL_2,
80 (MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
81 i2c_smbus_write_byte_data(isp1301_i2c_client,
82 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
83 i2c_smbus_write_byte_data(isp1301_i2c_client,
84 ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
85 i2c_smbus_write_byte_data(isp1301_i2c_client,
86 ISP1301_I2C_OTG_CONTROL_1,
87 (OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
88 i2c_smbus_write_byte_data(isp1301_i2c_client,
89 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
90 (OTG1_DM_PULLUP | OTG1_DP_PULLUP));
91 i2c_smbus_write_byte_data(isp1301_i2c_client,
92 ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
93 i2c_smbus_write_byte_data(isp1301_i2c_client,
94 ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
95 ~0);
96 i2c_smbus_write_byte_data(isp1301_i2c_client,
97 ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
98
99 printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
100 i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
101 printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
102 i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
103 printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
104 i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
105}
106
107static void isp1301_configure(void)
108{
109 isp1301_configure_lpc32xx();
110}
111
112static inline void isp1301_vbus_on(void)
113{
114 i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
115 OTG1_VBUS_DRV);
116}
117
118static inline void isp1301_vbus_off(void)
119{
120 i2c_smbus_write_byte_data(isp1301_i2c_client,
121 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
122 OTG1_VBUS_DRV);
123}
124
125static void ohci_nxp_start_hc(void)
126{
127 unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
128
129 __raw_writel(tmp, USB_OTG_STAT_CONTROL);
130 isp1301_vbus_on();
131}
132
133static void ohci_nxp_stop_hc(void)
134{
135 unsigned long tmp;
136
137 isp1301_vbus_off();
138 tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
139 __raw_writel(tmp, USB_OTG_STAT_CONTROL);
140}
141
142static int ohci_hcd_nxp_probe(struct platform_device *pdev)
143{
144 struct usb_hcd *hcd = 0;
145 const struct hc_driver *driver = &ohci_nxp_hc_driver;
146 struct resource *res;
147 int ret = 0, irq;
148 struct device_node *isp1301_node;
149
150 if (pdev->dev.of_node) {
151 isp1301_node = of_parse_phandle(pdev->dev.of_node,
152 "transceiver", 0);
153 } else {
154 isp1301_node = NULL;
155 }
156
157 isp1301_i2c_client = isp1301_get_client(isp1301_node);
158 if (!isp1301_i2c_client)
159 return -EPROBE_DEFER;
160
161 ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
162 if (ret)
163 goto fail_disable;
164
165 dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
166 if (usb_disabled()) {
167 dev_err(&pdev->dev, "USB is disabled\n");
168 ret = -ENODEV;
169 goto fail_disable;
170 }
171
172 /* Enable USB host clock */
173 usb_host_clk = devm_clk_get(&pdev->dev, NULL);
174 if (IS_ERR(usb_host_clk)) {
175 dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
176 ret = PTR_ERR(usb_host_clk);
177 goto fail_disable;
178 }
179
180 ret = clk_prepare_enable(usb_host_clk);
181 if (ret < 0) {
182 dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
183 goto fail_disable;
184 }
185
186 isp1301_configure();
187
188 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
189 if (!hcd) {
190 dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
191 ret = -ENOMEM;
192 goto fail_hcd;
193 }
194
195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
196 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
197 if (IS_ERR(hcd->regs)) {
198 ret = PTR_ERR(hcd->regs);
199 goto fail_resource;
200 }
201 hcd->rsrc_start = res->start;
202 hcd->rsrc_len = resource_size(res);
203
204 irq = platform_get_irq(pdev, 0);
205 if (irq < 0) {
206 ret = -ENXIO;
207 goto fail_resource;
208 }
209
210 ohci_nxp_start_hc();
211 platform_set_drvdata(pdev, hcd);
212
213 dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
214 ret = usb_add_hcd(hcd, irq, 0);
215 if (ret == 0) {
216 device_wakeup_enable(hcd->self.controller);
217 return ret;
218 }
219
220 ohci_nxp_stop_hc();
221fail_resource:
222 usb_put_hcd(hcd);
223fail_hcd:
224 clk_disable_unprepare(usb_host_clk);
225fail_disable:
226 isp1301_i2c_client = NULL;
227 return ret;
228}
229
230static int ohci_hcd_nxp_remove(struct platform_device *pdev)
231{
232 struct usb_hcd *hcd = platform_get_drvdata(pdev);
233
234 usb_remove_hcd(hcd);
235 ohci_nxp_stop_hc();
236 usb_put_hcd(hcd);
237 clk_disable_unprepare(usb_host_clk);
238 isp1301_i2c_client = NULL;
239
240 return 0;
241}
242
243/* work with hotplug and coldplug */
244MODULE_ALIAS("platform:usb-ohci");
245
246#ifdef CONFIG_OF
247static const struct of_device_id ohci_hcd_nxp_match[] = {
248 { .compatible = "nxp,ohci-nxp" },
249 {},
250};
251MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match);
252#endif
253
254static struct platform_driver ohci_hcd_nxp_driver = {
255 .driver = {
256 .name = "usb-ohci",
257 .of_match_table = of_match_ptr(ohci_hcd_nxp_match),
258 },
259 .probe = ohci_hcd_nxp_probe,
260 .remove = ohci_hcd_nxp_remove,
261};
262
263static int __init ohci_nxp_init(void)
264{
265 if (usb_disabled())
266 return -ENODEV;
267
268 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
269
270 ohci_init_driver(&ohci_nxp_hc_driver, NULL);
271 return platform_driver_register(&ohci_hcd_nxp_driver);
272}
273module_init(ohci_nxp_init);
274
275static void __exit ohci_nxp_cleanup(void)
276{
277 platform_driver_unregister(&ohci_hcd_nxp_driver);
278}
279module_exit(ohci_nxp_cleanup);
280
281MODULE_DESCRIPTION(DRIVER_DESC);
282MODULE_LICENSE("GPL v2");