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Commit | Line | Data |
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60bbfc84 | 1 | /* |
28643104 | 2 | * driver for NXP USB Host devices |
60bbfc84 | 3 | * |
28643104 | 4 | * Currently supported OHCI host devices: |
53dc25ad | 5 | * - NXP LPC32xx |
60bbfc84 VW |
6 | * |
7 | * Authors: Dmitry Chigirev <source@mvista.com> | |
dd9048af | 8 | * Vitaly Wool <vitalywool@gmail.com> |
60bbfc84 VW |
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> | |
30330b8f MG |
22 | #include <linux/dma-mapping.h> |
23 | #include <linux/io.h> | |
60bbfc84 | 24 | #include <linux/i2c.h> |
30330b8f | 25 | #include <linux/module.h> |
2265efea | 26 | #include <linux/of.h> |
30330b8f | 27 | #include <linux/platform_device.h> |
73108aa9 | 28 | #include <linux/usb/isp1301.h> |
30330b8f MG |
29 | #include <linux/usb.h> |
30 | #include <linux/usb/hcd.h> | |
31 | ||
32 | #include "ohci.h" | |
33 | ||
a09e64fb | 34 | #include <mach/hardware.h> |
60bbfc84 | 35 | |
53dc25ad | 36 | #define USB_CONFIG_BASE 0x31020000 |
53dc25ad | 37 | #define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110) |
60bbfc84 VW |
38 | |
39 | /* USB_OTG_STAT_CONTROL bit defines */ | |
40 | #define TRANSPARENT_I2C_EN (1 << 7) | |
41 | #define HOST_EN (1 << 0) | |
42 | ||
53dc25ad RS |
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 | ||
30330b8f MG |
52 | #define DRIVER_DESC "OHCI NXP driver" |
53 | ||
54 | static const char hcd_name[] = "ohci-nxp"; | |
55 | static struct hc_driver __read_mostly ohci_nxp_hc_driver; | |
56 | ||
09ce497e | 57 | static struct i2c_client *isp1301_i2c_client; |
60bbfc84 VW |
58 | |
59 | extern int usb_disabled(void); | |
60bbfc84 | 60 | |
83253b3b | 61 | static struct clk *usb_host_clk; |
60bbfc84 | 62 | |
53dc25ad RS |
63 | static void isp1301_configure_lpc32xx(void) |
64 | { | |
65 | /* LPC32XX only supports DAT_SE0 USB mode */ | |
66 | /* This sequence is important */ | |
67 | ||
68 | /* Disable transparent UART mode first */ | |
69 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
70 | (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), | |
71 | MC1_UART_EN); | |
72 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
73 | (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), | |
74 | ~MC1_SPEED_REG); | |
75 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
76 | ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG); | |
77 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
78 | (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), | |
79 | ~0); | |
80 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
81 | ISP1301_I2C_MODE_CONTROL_2, | |
82 | (MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL)); | |
83 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
84 | (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); | |
85 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
86 | ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0); | |
87 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
88 | ISP1301_I2C_OTG_CONTROL_1, | |
89 | (OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
90 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
91 | (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), | |
92 | (OTG1_DM_PULLUP | OTG1_DP_PULLUP)); | |
93 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
94 | ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0); | |
95 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
96 | ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, | |
97 | ~0); | |
98 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
99 | ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); | |
100 | ||
53dc25ad RS |
101 | printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n", |
102 | i2c_smbus_read_word_data(isp1301_i2c_client, 0x00)); | |
103 | printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n", | |
104 | i2c_smbus_read_word_data(isp1301_i2c_client, 0x02)); | |
105 | printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n", | |
106 | i2c_smbus_read_word_data(isp1301_i2c_client, 0x14)); | |
107 | } | |
108 | ||
109 | static void isp1301_configure(void) | |
110 | { | |
d684f05f | 111 | isp1301_configure_lpc32xx(); |
60bbfc84 VW |
112 | } |
113 | ||
114 | static inline void isp1301_vbus_on(void) | |
115 | { | |
a6a36008 RS |
116 | i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1, |
117 | OTG1_VBUS_DRV); | |
60bbfc84 VW |
118 | } |
119 | ||
120 | static inline void isp1301_vbus_off(void) | |
121 | { | |
a6a36008 RS |
122 | i2c_smbus_write_byte_data(isp1301_i2c_client, |
123 | ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, | |
124 | OTG1_VBUS_DRV); | |
60bbfc84 VW |
125 | } |
126 | ||
30330b8f | 127 | static void ohci_nxp_start_hc(void) |
60bbfc84 VW |
128 | { |
129 | unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN; | |
130 | __raw_writel(tmp, USB_OTG_STAT_CONTROL); | |
131 | isp1301_vbus_on(); | |
132 | } | |
133 | ||
30330b8f | 134 | static void ohci_nxp_stop_hc(void) |
60bbfc84 VW |
135 | { |
136 | unsigned long tmp; | |
137 | isp1301_vbus_off(); | |
138 | tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN; | |
139 | __raw_writel(tmp, USB_OTG_STAT_CONTROL); | |
140 | } | |
141 | ||
30330b8f | 142 | static int ohci_hcd_nxp_probe(struct platform_device *pdev) |
60bbfc84 VW |
143 | { |
144 | struct usb_hcd *hcd = 0; | |
28643104 | 145 | const struct hc_driver *driver = &ohci_nxp_hc_driver; |
a6a99cf0 | 146 | struct resource *res; |
60bbfc84 | 147 | int ret = 0, irq; |
73108aa9 RS |
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) { | |
b3517d5d | 159 | return -EPROBE_DEFER; |
73108aa9 | 160 | } |
60bbfc84 | 161 | |
e1fd7341 | 162 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
163 | if (ret) |
164 | goto fail_disable; | |
a6a99cf0 | 165 | |
28643104 | 166 | dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name); |
60bbfc84 | 167 | if (usb_disabled()) { |
b6c227ed | 168 | dev_err(&pdev->dev, "USB is disabled\n"); |
60bbfc84 | 169 | ret = -ENODEV; |
b3517d5d | 170 | goto fail_disable; |
60bbfc84 VW |
171 | } |
172 | ||
83253b3b VZ |
173 | /* Enable USB host clock */ |
174 | usb_host_clk = devm_clk_get(&pdev->dev, NULL); | |
175 | if (IS_ERR(usb_host_clk)) { | |
176 | dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n"); | |
177 | ret = PTR_ERR(usb_host_clk); | |
ac8d81f3 | 178 | goto fail_disable; |
60bbfc84 VW |
179 | } |
180 | ||
83253b3b | 181 | ret = clk_prepare_enable(usb_host_clk); |
60bbfc84 | 182 | if (ret < 0) { |
83253b3b | 183 | dev_err(&pdev->dev, "failed to start USB OHCI clock\n"); |
ac8d81f3 | 184 | goto fail_disable; |
60bbfc84 VW |
185 | } |
186 | ||
78091dc2 | 187 | isp1301_configure(); |
60bbfc84 | 188 | |
a6a99cf0 | 189 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
60bbfc84 | 190 | if (!hcd) { |
b6c227ed | 191 | dev_err(&pdev->dev, "Failed to allocate HC buffer\n"); |
60bbfc84 | 192 | ret = -ENOMEM; |
b3517d5d | 193 | goto fail_hcd; |
60bbfc84 VW |
194 | } |
195 | ||
a6a99cf0 | 196 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
148e1134 TR |
197 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
198 | if (IS_ERR(hcd->regs)) { | |
199 | ret = PTR_ERR(hcd->regs); | |
b3517d5d | 200 | goto fail_resource; |
60bbfc84 | 201 | } |
a6a99cf0 RS |
202 | hcd->rsrc_start = res->start; |
203 | hcd->rsrc_len = resource_size(res); | |
60bbfc84 VW |
204 | |
205 | irq = platform_get_irq(pdev, 0); | |
206 | if (irq < 0) { | |
207 | ret = -ENXIO; | |
b3517d5d | 208 | goto fail_resource; |
60bbfc84 VW |
209 | } |
210 | ||
30330b8f | 211 | ohci_nxp_start_hc(); |
60bbfc84 | 212 | platform_set_drvdata(pdev, hcd); |
60bbfc84 VW |
213 | |
214 | dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq); | |
b5dd18d8 | 215 | ret = usb_add_hcd(hcd, irq, 0); |
3c9740a1 PC |
216 | if (ret == 0) { |
217 | device_wakeup_enable(hcd->self.controller); | |
60bbfc84 | 218 | return ret; |
3c9740a1 | 219 | } |
60bbfc84 | 220 | |
30330b8f | 221 | ohci_nxp_stop_hc(); |
b3517d5d | 222 | fail_resource: |
60bbfc84 | 223 | usb_put_hcd(hcd); |
b3517d5d | 224 | fail_hcd: |
83253b3b | 225 | clk_disable_unprepare(usb_host_clk); |
b3517d5d | 226 | fail_disable: |
3a407e73 | 227 | isp1301_i2c_client = NULL; |
60bbfc84 VW |
228 | return ret; |
229 | } | |
230 | ||
30330b8f | 231 | static int ohci_hcd_nxp_remove(struct platform_device *pdev) |
60bbfc84 VW |
232 | { |
233 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
234 | ||
235 | usb_remove_hcd(hcd); | |
30330b8f | 236 | ohci_nxp_stop_hc(); |
60bbfc84 | 237 | usb_put_hcd(hcd); |
83253b3b | 238 | clk_disable_unprepare(usb_host_clk); |
3a407e73 | 239 | isp1301_i2c_client = NULL; |
60bbfc84 | 240 | |
60bbfc84 VW |
241 | return 0; |
242 | } | |
243 | ||
f4fce61d KS |
244 | /* work with hotplug and coldplug */ |
245 | MODULE_ALIAS("platform:usb-ohci"); | |
246 | ||
2265efea | 247 | #ifdef CONFIG_OF |
30330b8f | 248 | static const struct of_device_id ohci_hcd_nxp_match[] = { |
2265efea RS |
249 | { .compatible = "nxp,ohci-nxp" }, |
250 | {}, | |
251 | }; | |
30330b8f | 252 | MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match); |
2265efea RS |
253 | #endif |
254 | ||
30330b8f | 255 | static struct platform_driver ohci_hcd_nxp_driver = { |
60bbfc84 VW |
256 | .driver = { |
257 | .name = "usb-ohci", | |
30330b8f | 258 | .of_match_table = of_match_ptr(ohci_hcd_nxp_match), |
60bbfc84 | 259 | }, |
30330b8f MG |
260 | .probe = ohci_hcd_nxp_probe, |
261 | .remove = ohci_hcd_nxp_remove, | |
60bbfc84 VW |
262 | }; |
263 | ||
30330b8f MG |
264 | static int __init ohci_nxp_init(void) |
265 | { | |
266 | if (usb_disabled()) | |
267 | return -ENODEV; | |
268 | ||
269 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
270 | ||
271 | ohci_init_driver(&ohci_nxp_hc_driver, NULL); | |
272 | return platform_driver_register(&ohci_hcd_nxp_driver); | |
273 | } | |
274 | module_init(ohci_nxp_init); | |
275 | ||
276 | static void __exit ohci_nxp_cleanup(void) | |
277 | { | |
278 | platform_driver_unregister(&ohci_hcd_nxp_driver); | |
279 | } | |
280 | module_exit(ohci_nxp_cleanup); | |
281 | ||
282 | MODULE_DESCRIPTION(DRIVER_DESC); | |
283 | MODULE_LICENSE("GPL v2"); |