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Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
60bbfc84 | 2 | /* |
28643104 | 3 | * driver for NXP USB Host devices |
60bbfc84 | 4 | * |
28643104 | 5 | * Currently supported OHCI host devices: |
53dc25ad | 6 | * - NXP LPC32xx |
60bbfc84 VW |
7 | * |
8 | * Authors: Dmitry Chigirev <source@mvista.com> | |
dd9048af | 9 | * Vitaly Wool <vitalywool@gmail.com> |
60bbfc84 VW |
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 | * | |
ef1362d9 | 17 | * 2005-2006 (c) MontaVista Software, Inc. |
60bbfc84 VW |
18 | */ |
19 | #include <linux/clk.h> | |
30330b8f MG |
20 | #include <linux/dma-mapping.h> |
21 | #include <linux/io.h> | |
60bbfc84 | 22 | #include <linux/i2c.h> |
30330b8f | 23 | #include <linux/module.h> |
2265efea | 24 | #include <linux/of.h> |
30330b8f | 25 | #include <linux/platform_device.h> |
73108aa9 | 26 | #include <linux/usb/isp1301.h> |
30330b8f MG |
27 | #include <linux/usb.h> |
28 | #include <linux/usb/hcd.h> | |
29 | ||
30 | #include "ohci.h" | |
31 | ||
53dc25ad | 32 | #define USB_CONFIG_BASE 0x31020000 |
60bbfc84 VW |
33 | |
34 | /* USB_OTG_STAT_CONTROL bit defines */ | |
35 | #define TRANSPARENT_I2C_EN (1 << 7) | |
36 | #define HOST_EN (1 << 0) | |
37 | ||
53dc25ad RS |
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 | ||
30330b8f MG |
47 | #define DRIVER_DESC "OHCI NXP driver" |
48 | ||
49 | static const char hcd_name[] = "ohci-nxp"; | |
50 | static struct hc_driver __read_mostly ohci_nxp_hc_driver; | |
51 | ||
09ce497e | 52 | static struct i2c_client *isp1301_i2c_client; |
60bbfc84 | 53 | |
83253b3b | 54 | static struct clk *usb_host_clk; |
60bbfc84 | 55 | |
53dc25ad RS |
56 | static 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 | ||
53dc25ad RS |
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 | ||
102 | static void isp1301_configure(void) | |
103 | { | |
d684f05f | 104 | isp1301_configure_lpc32xx(); |
60bbfc84 VW |
105 | } |
106 | ||
107 | static inline void isp1301_vbus_on(void) | |
108 | { | |
a6a36008 RS |
109 | i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1, |
110 | OTG1_VBUS_DRV); | |
60bbfc84 VW |
111 | } |
112 | ||
113 | static inline void isp1301_vbus_off(void) | |
114 | { | |
a6a36008 RS |
115 | i2c_smbus_write_byte_data(isp1301_i2c_client, |
116 | ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, | |
117 | OTG1_VBUS_DRV); | |
60bbfc84 VW |
118 | } |
119 | ||
30330b8f | 120 | static void ohci_nxp_start_hc(void) |
60bbfc84 | 121 | { |
23565bae AB |
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; | |
5c5a94a5 | 129 | |
23565bae | 130 | __raw_writel(tmp, usb_otg_stat_control); |
60bbfc84 | 131 | isp1301_vbus_on(); |
23565bae AB |
132 | |
133 | iounmap(usb_otg_stat_control); | |
60bbfc84 VW |
134 | } |
135 | ||
30330b8f | 136 | static void ohci_nxp_stop_hc(void) |
60bbfc84 | 137 | { |
23565bae | 138 | void __iomem *usb_otg_stat_control = ioremap(USB_CONFIG_BASE + 0x110, 4); |
60bbfc84 | 139 | unsigned long tmp; |
5c5a94a5 | 140 | |
23565bae AB |
141 | if (WARN_ON(!usb_otg_stat_control)) |
142 | return; | |
143 | ||
60bbfc84 | 144 | isp1301_vbus_off(); |
23565bae AB |
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); | |
60bbfc84 VW |
149 | } |
150 | ||
30330b8f | 151 | static int ohci_hcd_nxp_probe(struct platform_device *pdev) |
60bbfc84 | 152 | { |
09e2a8b7 | 153 | struct usb_hcd *hcd = NULL; |
28643104 | 154 | const struct hc_driver *driver = &ohci_nxp_hc_driver; |
a6a99cf0 | 155 | struct resource *res; |
60bbfc84 | 156 | int ret = 0, irq; |
73108aa9 RS |
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); | |
5c5a94a5 | 167 | if (!isp1301_i2c_client) |
b3517d5d | 168 | return -EPROBE_DEFER; |
60bbfc84 | 169 | |
e1fd7341 | 170 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
171 | if (ret) |
172 | goto fail_disable; | |
a6a99cf0 | 173 | |
28643104 | 174 | dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name); |
60bbfc84 | 175 | if (usb_disabled()) { |
b6c227ed | 176 | dev_err(&pdev->dev, "USB is disabled\n"); |
60bbfc84 | 177 | ret = -ENODEV; |
b3517d5d | 178 | goto fail_disable; |
60bbfc84 VW |
179 | } |
180 | ||
83253b3b VZ |
181 | /* Enable USB host clock */ |
182 | usb_host_clk = devm_clk_get(&pdev->dev, NULL); | |
183 | if (IS_ERR(usb_host_clk)) { | |
184 | dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n"); | |
185 | ret = PTR_ERR(usb_host_clk); | |
ac8d81f3 | 186 | goto fail_disable; |
60bbfc84 VW |
187 | } |
188 | ||
83253b3b | 189 | ret = clk_prepare_enable(usb_host_clk); |
60bbfc84 | 190 | if (ret < 0) { |
83253b3b | 191 | dev_err(&pdev->dev, "failed to start USB OHCI clock\n"); |
ac8d81f3 | 192 | goto fail_disable; |
60bbfc84 VW |
193 | } |
194 | ||
78091dc2 | 195 | isp1301_configure(); |
60bbfc84 | 196 | |
a6a99cf0 | 197 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
60bbfc84 | 198 | if (!hcd) { |
b6c227ed | 199 | dev_err(&pdev->dev, "Failed to allocate HC buffer\n"); |
60bbfc84 | 200 | ret = -ENOMEM; |
b3517d5d | 201 | goto fail_hcd; |
60bbfc84 VW |
202 | } |
203 | ||
a6a99cf0 | 204 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
148e1134 TR |
205 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
206 | if (IS_ERR(hcd->regs)) { | |
207 | ret = PTR_ERR(hcd->regs); | |
b3517d5d | 208 | goto fail_resource; |
60bbfc84 | 209 | } |
a6a99cf0 RS |
210 | hcd->rsrc_start = res->start; |
211 | hcd->rsrc_len = resource_size(res); | |
60bbfc84 VW |
212 | |
213 | irq = platform_get_irq(pdev, 0); | |
214 | if (irq < 0) { | |
215 | ret = -ENXIO; | |
b3517d5d | 216 | goto fail_resource; |
60bbfc84 VW |
217 | } |
218 | ||
30330b8f | 219 | ohci_nxp_start_hc(); |
60bbfc84 | 220 | platform_set_drvdata(pdev, hcd); |
60bbfc84 VW |
221 | |
222 | dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq); | |
b5dd18d8 | 223 | ret = usb_add_hcd(hcd, irq, 0); |
3c9740a1 PC |
224 | if (ret == 0) { |
225 | device_wakeup_enable(hcd->self.controller); | |
60bbfc84 | 226 | return ret; |
3c9740a1 | 227 | } |
60bbfc84 | 228 | |
30330b8f | 229 | ohci_nxp_stop_hc(); |
b3517d5d | 230 | fail_resource: |
60bbfc84 | 231 | usb_put_hcd(hcd); |
b3517d5d | 232 | fail_hcd: |
83253b3b | 233 | clk_disable_unprepare(usb_host_clk); |
b3517d5d | 234 | fail_disable: |
3a407e73 | 235 | isp1301_i2c_client = NULL; |
60bbfc84 VW |
236 | return ret; |
237 | } | |
238 | ||
30330b8f | 239 | static int ohci_hcd_nxp_remove(struct platform_device *pdev) |
60bbfc84 VW |
240 | { |
241 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
242 | ||
243 | usb_remove_hcd(hcd); | |
30330b8f | 244 | ohci_nxp_stop_hc(); |
60bbfc84 | 245 | usb_put_hcd(hcd); |
83253b3b | 246 | clk_disable_unprepare(usb_host_clk); |
3a407e73 | 247 | isp1301_i2c_client = NULL; |
60bbfc84 | 248 | |
60bbfc84 VW |
249 | return 0; |
250 | } | |
251 | ||
f4fce61d KS |
252 | /* work with hotplug and coldplug */ |
253 | MODULE_ALIAS("platform:usb-ohci"); | |
254 | ||
2265efea | 255 | #ifdef CONFIG_OF |
30330b8f | 256 | static const struct of_device_id ohci_hcd_nxp_match[] = { |
2265efea RS |
257 | { .compatible = "nxp,ohci-nxp" }, |
258 | {}, | |
259 | }; | |
30330b8f | 260 | MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match); |
2265efea RS |
261 | #endif |
262 | ||
30330b8f | 263 | static struct platform_driver ohci_hcd_nxp_driver = { |
60bbfc84 VW |
264 | .driver = { |
265 | .name = "usb-ohci", | |
30330b8f | 266 | .of_match_table = of_match_ptr(ohci_hcd_nxp_match), |
60bbfc84 | 267 | }, |
30330b8f MG |
268 | .probe = ohci_hcd_nxp_probe, |
269 | .remove = ohci_hcd_nxp_remove, | |
60bbfc84 VW |
270 | }; |
271 | ||
30330b8f MG |
272 | static int __init ohci_nxp_init(void) |
273 | { | |
274 | if (usb_disabled()) | |
275 | return -ENODEV; | |
276 | ||
277 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
278 | ||
279 | ohci_init_driver(&ohci_nxp_hc_driver, NULL); | |
280 | return platform_driver_register(&ohci_hcd_nxp_driver); | |
281 | } | |
282 | module_init(ohci_nxp_init); | |
283 | ||
284 | static void __exit ohci_nxp_cleanup(void) | |
285 | { | |
286 | platform_driver_unregister(&ohci_hcd_nxp_driver); | |
287 | } | |
288 | module_exit(ohci_nxp_cleanup); | |
289 | ||
290 | MODULE_DESCRIPTION(DRIVER_DESC); | |
291 | MODULE_LICENSE("GPL v2"); |