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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 | |
78091dc2 APS |
61 | static struct clk *usb_pll_clk; |
62 | static struct clk *usb_dev_clk; | |
63 | static struct clk *usb_otg_clk; | |
60bbfc84 | 64 | |
53dc25ad RS |
65 | static void isp1301_configure_lpc32xx(void) |
66 | { | |
67 | /* LPC32XX only supports DAT_SE0 USB mode */ | |
68 | /* This sequence is important */ | |
69 | ||
70 | /* Disable transparent UART mode first */ | |
71 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
72 | (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), | |
73 | MC1_UART_EN); | |
74 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
75 | (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), | |
76 | ~MC1_SPEED_REG); | |
77 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
78 | ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG); | |
79 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
80 | (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), | |
81 | ~0); | |
82 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
83 | ISP1301_I2C_MODE_CONTROL_2, | |
84 | (MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL)); | |
85 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
86 | (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); | |
87 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
88 | ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0); | |
89 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
90 | ISP1301_I2C_OTG_CONTROL_1, | |
91 | (OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); | |
92 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
93 | (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), | |
94 | (OTG1_DM_PULLUP | OTG1_DP_PULLUP)); | |
95 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
96 | ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0); | |
97 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
98 | ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, | |
99 | ~0); | |
100 | i2c_smbus_write_byte_data(isp1301_i2c_client, | |
101 | ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); | |
102 | ||
53dc25ad RS |
103 | printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n", |
104 | i2c_smbus_read_word_data(isp1301_i2c_client, 0x00)); | |
105 | printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n", | |
106 | i2c_smbus_read_word_data(isp1301_i2c_client, 0x02)); | |
107 | printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n", | |
108 | i2c_smbus_read_word_data(isp1301_i2c_client, 0x14)); | |
109 | } | |
110 | ||
111 | static void isp1301_configure(void) | |
112 | { | |
d684f05f | 113 | isp1301_configure_lpc32xx(); |
60bbfc84 VW |
114 | } |
115 | ||
116 | static inline void isp1301_vbus_on(void) | |
117 | { | |
a6a36008 RS |
118 | i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1, |
119 | OTG1_VBUS_DRV); | |
60bbfc84 VW |
120 | } |
121 | ||
122 | static inline void isp1301_vbus_off(void) | |
123 | { | |
a6a36008 RS |
124 | i2c_smbus_write_byte_data(isp1301_i2c_client, |
125 | ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, | |
126 | OTG1_VBUS_DRV); | |
60bbfc84 VW |
127 | } |
128 | ||
30330b8f | 129 | static void ohci_nxp_start_hc(void) |
60bbfc84 VW |
130 | { |
131 | unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN; | |
132 | __raw_writel(tmp, USB_OTG_STAT_CONTROL); | |
133 | isp1301_vbus_on(); | |
134 | } | |
135 | ||
30330b8f | 136 | static void ohci_nxp_stop_hc(void) |
60bbfc84 VW |
137 | { |
138 | unsigned long tmp; | |
139 | isp1301_vbus_off(); | |
140 | tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN; | |
141 | __raw_writel(tmp, USB_OTG_STAT_CONTROL); | |
142 | } | |
143 | ||
30330b8f | 144 | static int ohci_hcd_nxp_probe(struct platform_device *pdev) |
60bbfc84 VW |
145 | { |
146 | struct usb_hcd *hcd = 0; | |
28643104 | 147 | const struct hc_driver *driver = &ohci_nxp_hc_driver; |
a6a99cf0 | 148 | struct resource *res; |
60bbfc84 | 149 | int ret = 0, irq; |
73108aa9 RS |
150 | struct device_node *isp1301_node; |
151 | ||
152 | if (pdev->dev.of_node) { | |
153 | isp1301_node = of_parse_phandle(pdev->dev.of_node, | |
154 | "transceiver", 0); | |
155 | } else { | |
156 | isp1301_node = NULL; | |
157 | } | |
158 | ||
159 | isp1301_i2c_client = isp1301_get_client(isp1301_node); | |
160 | if (!isp1301_i2c_client) { | |
b3517d5d | 161 | return -EPROBE_DEFER; |
73108aa9 | 162 | } |
60bbfc84 | 163 | |
e1fd7341 | 164 | ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
22d9d8e8 RK |
165 | if (ret) |
166 | goto fail_disable; | |
a6a99cf0 | 167 | |
28643104 | 168 | dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name); |
60bbfc84 | 169 | if (usb_disabled()) { |
b6c227ed | 170 | dev_err(&pdev->dev, "USB is disabled\n"); |
60bbfc84 | 171 | ret = -ENODEV; |
b3517d5d | 172 | goto fail_disable; |
60bbfc84 VW |
173 | } |
174 | ||
60bbfc84 | 175 | /* Enable USB PLL */ |
ac8d81f3 | 176 | usb_pll_clk = devm_clk_get(&pdev->dev, "ck_pll5"); |
78091dc2 | 177 | if (IS_ERR(usb_pll_clk)) { |
b6c227ed | 178 | dev_err(&pdev->dev, "failed to acquire USB PLL\n"); |
78091dc2 | 179 | ret = PTR_ERR(usb_pll_clk); |
ac8d81f3 | 180 | goto fail_disable; |
60bbfc84 VW |
181 | } |
182 | ||
9ae79876 | 183 | ret = clk_prepare_enable(usb_pll_clk); |
60bbfc84 | 184 | if (ret < 0) { |
b6c227ed | 185 | dev_err(&pdev->dev, "failed to start USB PLL\n"); |
ac8d81f3 | 186 | goto fail_disable; |
60bbfc84 VW |
187 | } |
188 | ||
78091dc2 | 189 | ret = clk_set_rate(usb_pll_clk, 48000); |
60bbfc84 | 190 | if (ret < 0) { |
b6c227ed | 191 | dev_err(&pdev->dev, "failed to set USB clock rate\n"); |
b3517d5d | 192 | goto fail_rate; |
60bbfc84 VW |
193 | } |
194 | ||
78091dc2 | 195 | /* Enable USB device clock */ |
ac8d81f3 | 196 | usb_dev_clk = devm_clk_get(&pdev->dev, "ck_usbd"); |
78091dc2 APS |
197 | if (IS_ERR(usb_dev_clk)) { |
198 | dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n"); | |
199 | ret = PTR_ERR(usb_dev_clk); | |
ac8d81f3 | 200 | goto fail_rate; |
78091dc2 APS |
201 | } |
202 | ||
9ae79876 | 203 | ret = clk_prepare_enable(usb_dev_clk); |
78091dc2 APS |
204 | if (ret < 0) { |
205 | dev_err(&pdev->dev, "failed to start USB DEV Clock\n"); | |
ac8d81f3 | 206 | goto fail_rate; |
78091dc2 APS |
207 | } |
208 | ||
209 | /* Enable USB otg clocks */ | |
ac8d81f3 | 210 | usb_otg_clk = devm_clk_get(&pdev->dev, "ck_usb_otg"); |
78091dc2 APS |
211 | if (IS_ERR(usb_otg_clk)) { |
212 | dev_err(&pdev->dev, "failed to acquire USB DEV Clock\n"); | |
2ec15a6f | 213 | ret = PTR_ERR(usb_otg_clk); |
b3517d5d | 214 | goto fail_otg; |
78091dc2 APS |
215 | } |
216 | ||
9ae79876 | 217 | ret = clk_prepare_enable(usb_otg_clk); |
78091dc2 APS |
218 | if (ret < 0) { |
219 | dev_err(&pdev->dev, "failed to start USB DEV Clock\n"); | |
ac8d81f3 | 220 | goto fail_otg; |
78091dc2 | 221 | } |
60bbfc84 | 222 | |
78091dc2 | 223 | isp1301_configure(); |
60bbfc84 | 224 | |
a6a99cf0 | 225 | hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev)); |
60bbfc84 | 226 | if (!hcd) { |
b6c227ed | 227 | dev_err(&pdev->dev, "Failed to allocate HC buffer\n"); |
60bbfc84 | 228 | ret = -ENOMEM; |
b3517d5d | 229 | goto fail_hcd; |
60bbfc84 VW |
230 | } |
231 | ||
a6a99cf0 | 232 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
148e1134 TR |
233 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
234 | if (IS_ERR(hcd->regs)) { | |
235 | ret = PTR_ERR(hcd->regs); | |
b3517d5d | 236 | goto fail_resource; |
60bbfc84 | 237 | } |
a6a99cf0 RS |
238 | hcd->rsrc_start = res->start; |
239 | hcd->rsrc_len = resource_size(res); | |
60bbfc84 VW |
240 | |
241 | irq = platform_get_irq(pdev, 0); | |
242 | if (irq < 0) { | |
243 | ret = -ENXIO; | |
b3517d5d | 244 | goto fail_resource; |
60bbfc84 VW |
245 | } |
246 | ||
30330b8f | 247 | ohci_nxp_start_hc(); |
60bbfc84 | 248 | platform_set_drvdata(pdev, hcd); |
60bbfc84 VW |
249 | |
250 | dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq); | |
b5dd18d8 | 251 | ret = usb_add_hcd(hcd, irq, 0); |
3c9740a1 PC |
252 | if (ret == 0) { |
253 | device_wakeup_enable(hcd->self.controller); | |
60bbfc84 | 254 | return ret; |
3c9740a1 | 255 | } |
60bbfc84 | 256 | |
30330b8f | 257 | ohci_nxp_stop_hc(); |
b3517d5d | 258 | fail_resource: |
60bbfc84 | 259 | usb_put_hcd(hcd); |
b3517d5d | 260 | fail_hcd: |
9ae79876 | 261 | clk_disable_unprepare(usb_otg_clk); |
b3517d5d | 262 | fail_otg: |
9ae79876 | 263 | clk_disable_unprepare(usb_dev_clk); |
b3517d5d | 264 | fail_rate: |
9ae79876 | 265 | clk_disable_unprepare(usb_pll_clk); |
b3517d5d | 266 | fail_disable: |
3a407e73 | 267 | isp1301_i2c_client = NULL; |
60bbfc84 VW |
268 | return ret; |
269 | } | |
270 | ||
30330b8f | 271 | static int ohci_hcd_nxp_remove(struct platform_device *pdev) |
60bbfc84 VW |
272 | { |
273 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
274 | ||
275 | usb_remove_hcd(hcd); | |
30330b8f | 276 | ohci_nxp_stop_hc(); |
60bbfc84 | 277 | usb_put_hcd(hcd); |
b1a0c423 | 278 | clk_disable_unprepare(usb_otg_clk); |
9ae79876 | 279 | clk_disable_unprepare(usb_dev_clk); |
b1a0c423 | 280 | clk_disable_unprepare(usb_pll_clk); |
3a407e73 | 281 | isp1301_i2c_client = NULL; |
60bbfc84 | 282 | |
60bbfc84 VW |
283 | return 0; |
284 | } | |
285 | ||
f4fce61d KS |
286 | /* work with hotplug and coldplug */ |
287 | MODULE_ALIAS("platform:usb-ohci"); | |
288 | ||
2265efea | 289 | #ifdef CONFIG_OF |
30330b8f | 290 | static const struct of_device_id ohci_hcd_nxp_match[] = { |
2265efea RS |
291 | { .compatible = "nxp,ohci-nxp" }, |
292 | {}, | |
293 | }; | |
30330b8f | 294 | MODULE_DEVICE_TABLE(of, ohci_hcd_nxp_match); |
2265efea RS |
295 | #endif |
296 | ||
30330b8f | 297 | static struct platform_driver ohci_hcd_nxp_driver = { |
60bbfc84 VW |
298 | .driver = { |
299 | .name = "usb-ohci", | |
30330b8f | 300 | .of_match_table = of_match_ptr(ohci_hcd_nxp_match), |
60bbfc84 | 301 | }, |
30330b8f MG |
302 | .probe = ohci_hcd_nxp_probe, |
303 | .remove = ohci_hcd_nxp_remove, | |
60bbfc84 VW |
304 | }; |
305 | ||
30330b8f MG |
306 | static int __init ohci_nxp_init(void) |
307 | { | |
308 | if (usb_disabled()) | |
309 | return -ENODEV; | |
310 | ||
311 | pr_info("%s: " DRIVER_DESC "\n", hcd_name); | |
312 | ||
313 | ohci_init_driver(&ohci_nxp_hc_driver, NULL); | |
314 | return platform_driver_register(&ohci_hcd_nxp_driver); | |
315 | } | |
316 | module_init(ohci_nxp_init); | |
317 | ||
318 | static void __exit ohci_nxp_cleanup(void) | |
319 | { | |
320 | platform_driver_unregister(&ohci_hcd_nxp_driver); | |
321 | } | |
322 | module_exit(ohci_nxp_cleanup); | |
323 | ||
324 | MODULE_DESCRIPTION(DRIVER_DESC); | |
325 | MODULE_LICENSE("GPL v2"); |