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1/*
2 * Ingenic JZ4740 "glue layer"
3 *
4 * Copyright (C) 2013, Apelete Seketeli <apelete@seketeli.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * You should have received a copy of the GNU General Public License along
12 * with this program; if not, write to the Free Software Foundation, Inc.,
13 * 675 Mass Ave, Cambridge, MA 02139, USA.
14 */
15
16#include <linux/clk.h>
17#include <linux/dma-mapping.h>
18#include <linux/errno.h>
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/platform_device.h>
22#include <linux/usb/usb_phy_generic.h>
23
24#include "musb_core.h"
25
26struct jz4740_glue {
27 struct device *dev;
28 struct platform_device *musb;
29 struct clk *clk;
30};
31
32static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci)
33{
34 unsigned long flags;
35 irqreturn_t retval = IRQ_NONE;
36 struct musb *musb = __hci;
37
38 spin_lock_irqsave(&musb->lock, flags);
39
40 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
41 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
42 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
43
44 /*
45 * The controller is gadget only, the state of the host mode IRQ bits is
46 * undefined. Mask them to make sure that the musb driver core will
47 * never see them set
48 */
49 musb->int_usb &= MUSB_INTR_SUSPEND | MUSB_INTR_RESUME |
50 MUSB_INTR_RESET | MUSB_INTR_SOF;
51
52 if (musb->int_usb || musb->int_tx || musb->int_rx)
53 retval = musb_interrupt(musb);
54
55 spin_unlock_irqrestore(&musb->lock, flags);
56
57 return retval;
58}
59
60static struct musb_fifo_cfg jz4740_musb_fifo_cfg[] = {
61{ .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
62{ .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
63{ .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 64, },
64};
65
66static struct musb_hdrc_config jz4740_musb_config = {
67 /* Silicon does not implement USB OTG. */
68 .multipoint = 0,
69 /* Max EPs scanned, driver will decide which EP can be used. */
70 .num_eps = 4,
71 /* RAMbits needed to configure EPs from table */
72 .ram_bits = 9,
73 .fifo_cfg = jz4740_musb_fifo_cfg,
74 .fifo_cfg_size = ARRAY_SIZE(jz4740_musb_fifo_cfg),
75};
76
77static struct musb_hdrc_platform_data jz4740_musb_platform_data = {
78 .mode = MUSB_PERIPHERAL,
79 .config = &jz4740_musb_config,
80};
81
82static int jz4740_musb_init(struct musb *musb)
83{
84 usb_phy_generic_register();
85 musb->xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
86 if (IS_ERR(musb->xceiv)) {
87 pr_err("HS UDC: no transceiver configured\n");
88 return PTR_ERR(musb->xceiv);
89 }
90
91 /* Silicon does not implement ConfigData register.
92 * Set dyn_fifo to avoid reading EP config from hardware.
93 */
94 musb->dyn_fifo = true;
95
96 musb->isr = jz4740_musb_interrupt;
97
98 return 0;
99}
100
101static int jz4740_musb_exit(struct musb *musb)
102{
103 usb_put_phy(musb->xceiv);
104
105 return 0;
106}
107
108/*
109 * DMA has not been confirmed to work with CONFIG_USB_INVENTRA_DMA,
110 * so let's not set up the dma function pointers yet.
111 */
112static const struct musb_platform_ops jz4740_musb_ops = {
113 .quirks = MUSB_DMA_INVENTRA | MUSB_INDEXED_EP,
114 .fifo_mode = 2,
115 .init = jz4740_musb_init,
116 .exit = jz4740_musb_exit,
117};
118
119static int jz4740_probe(struct platform_device *pdev)
120{
121 struct musb_hdrc_platform_data *pdata = &jz4740_musb_platform_data;
122 struct platform_device *musb;
123 struct jz4740_glue *glue;
124 struct clk *clk;
125 int ret;
126
127 glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
128 if (!glue)
129 return -ENOMEM;
130
131 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
132 if (!musb) {
133 dev_err(&pdev->dev, "failed to allocate musb device\n");
134 return -ENOMEM;
135 }
136
137 clk = devm_clk_get(&pdev->dev, "udc");
138 if (IS_ERR(clk)) {
139 dev_err(&pdev->dev, "failed to get clock\n");
140 ret = PTR_ERR(clk);
141 goto err_platform_device_put;
142 }
143
144 ret = clk_prepare_enable(clk);
145 if (ret) {
146 dev_err(&pdev->dev, "failed to enable clock\n");
147 goto err_platform_device_put;
148 }
149
150 musb->dev.parent = &pdev->dev;
151
152 glue->dev = &pdev->dev;
153 glue->musb = musb;
154 glue->clk = clk;
155
156 pdata->platform_ops = &jz4740_musb_ops;
157
158 platform_set_drvdata(pdev, glue);
159
160 ret = platform_device_add_resources(musb, pdev->resource,
161 pdev->num_resources);
162 if (ret) {
163 dev_err(&pdev->dev, "failed to add resources\n");
164 goto err_clk_disable;
165 }
166
167 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
168 if (ret) {
169 dev_err(&pdev->dev, "failed to add platform_data\n");
170 goto err_clk_disable;
171 }
172
173 ret = platform_device_add(musb);
174 if (ret) {
175 dev_err(&pdev->dev, "failed to register musb device\n");
176 goto err_clk_disable;
177 }
178
179 return 0;
180
181err_clk_disable:
182 clk_disable_unprepare(clk);
183err_platform_device_put:
184 platform_device_put(musb);
185 return ret;
186}
187
188static int jz4740_remove(struct platform_device *pdev)
189{
190 struct jz4740_glue *glue = platform_get_drvdata(pdev);
191
192 platform_device_unregister(glue->musb);
193 usb_phy_generic_unregister(pdev);
194 clk_disable_unprepare(glue->clk);
195
196 return 0;
197}
198
199static struct platform_driver jz4740_driver = {
200 .probe = jz4740_probe,
201 .remove = jz4740_remove,
202 .driver = {
203 .name = "musb-jz4740",
204 },
205};
206
207MODULE_DESCRIPTION("JZ4740 MUSB Glue Layer");
208MODULE_AUTHOR("Apelete Seketeli <apelete@seketeli.net>");
209MODULE_LICENSE("GPL v2");
210module_platform_driver(jz4740_driver);
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Ingenic JZ4740 "glue layer"
4 *
5 * Copyright (C) 2013, Apelete Seketeli <apelete@seketeli.net>
6 */
7
8#include <linux/clk.h>
9#include <linux/dma-mapping.h>
10#include <linux/errno.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/phy/phy.h>
15#include <linux/platform_device.h>
16#include <linux/usb/role.h>
17#include <linux/usb/usb_phy_generic.h>
18
19#include "musb_core.h"
20
21struct jz4740_glue {
22 struct platform_device *pdev;
23 struct musb *musb;
24 struct clk *clk;
25 struct usb_role_switch *role_sw;
26};
27
28static irqreturn_t jz4740_musb_interrupt(int irq, void *__hci)
29{
30 unsigned long flags;
31 irqreturn_t retval = IRQ_NONE, retval_dma = IRQ_NONE;
32 struct musb *musb = __hci;
33
34 if (IS_ENABLED(CONFIG_USB_INVENTRA_DMA) && musb->dma_controller)
35 retval_dma = dma_controller_irq(irq, musb->dma_controller);
36
37 spin_lock_irqsave(&musb->lock, flags);
38
39 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
40 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
41 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
42
43 /*
44 * The controller is gadget only, the state of the host mode IRQ bits is
45 * undefined. Mask them to make sure that the musb driver core will
46 * never see them set
47 */
48 musb->int_usb &= MUSB_INTR_SUSPEND | MUSB_INTR_RESUME |
49 MUSB_INTR_RESET | MUSB_INTR_SOF;
50
51 if (musb->int_usb || musb->int_tx || musb->int_rx)
52 retval = musb_interrupt(musb);
53
54 spin_unlock_irqrestore(&musb->lock, flags);
55
56 if (retval == IRQ_HANDLED || retval_dma == IRQ_HANDLED)
57 return IRQ_HANDLED;
58
59 return IRQ_NONE;
60}
61
62static struct musb_fifo_cfg jz4740_musb_fifo_cfg[] = {
63 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
64 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
65 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 64, },
66};
67
68static const struct musb_hdrc_config jz4740_musb_config = {
69 /* Silicon does not implement USB OTG. */
70 .multipoint = 0,
71 /* Max EPs scanned, driver will decide which EP can be used. */
72 .num_eps = 4,
73 /* RAMbits needed to configure EPs from table */
74 .ram_bits = 9,
75 .fifo_cfg = jz4740_musb_fifo_cfg,
76 .fifo_cfg_size = ARRAY_SIZE(jz4740_musb_fifo_cfg),
77};
78
79static int jz4740_musb_role_switch_set(struct usb_role_switch *sw,
80 enum usb_role role)
81{
82 struct jz4740_glue *glue = usb_role_switch_get_drvdata(sw);
83 struct usb_phy *phy = glue->musb->xceiv;
84
85 if (!phy)
86 return 0;
87
88 switch (role) {
89 case USB_ROLE_NONE:
90 atomic_notifier_call_chain(&phy->notifier, USB_EVENT_NONE, phy);
91 break;
92 case USB_ROLE_DEVICE:
93 atomic_notifier_call_chain(&phy->notifier, USB_EVENT_VBUS, phy);
94 break;
95 case USB_ROLE_HOST:
96 atomic_notifier_call_chain(&phy->notifier, USB_EVENT_ID, phy);
97 break;
98 }
99
100 return 0;
101}
102
103static int jz4740_musb_init(struct musb *musb)
104{
105 struct device *dev = musb->controller->parent;
106 struct jz4740_glue *glue = dev_get_drvdata(dev);
107 struct usb_role_switch_desc role_sw_desc = {
108 .set = jz4740_musb_role_switch_set,
109 .driver_data = glue,
110 .fwnode = dev_fwnode(dev),
111 };
112 int err;
113
114 glue->musb = musb;
115
116 if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
117 musb->phy = devm_of_phy_get_by_index(dev, dev->of_node, 0);
118 if (IS_ERR(musb->phy)) {
119 err = PTR_ERR(musb->phy);
120 if (err != -ENODEV) {
121 dev_err(dev, "Unable to get PHY\n");
122 return err;
123 }
124
125 musb->phy = NULL;
126 }
127 }
128
129 if (musb->phy) {
130 err = phy_init(musb->phy);
131 if (err) {
132 dev_err(dev, "Failed to init PHY\n");
133 return err;
134 }
135
136 err = phy_power_on(musb->phy);
137 if (err) {
138 dev_err(dev, "Unable to power on PHY\n");
139 goto err_phy_shutdown;
140 }
141 } else {
142 if (dev->of_node)
143 musb->xceiv = devm_usb_get_phy_by_phandle(dev, "phys", 0);
144 else
145 musb->xceiv = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
146 if (IS_ERR(musb->xceiv)) {
147 dev_err(dev, "No transceiver configured\n");
148 return PTR_ERR(musb->xceiv);
149 }
150 }
151
152 glue->role_sw = usb_role_switch_register(dev, &role_sw_desc);
153 if (IS_ERR(glue->role_sw)) {
154 dev_err(dev, "Failed to register USB role switch\n");
155 err = PTR_ERR(glue->role_sw);
156 goto err_phy_power_down;
157 }
158
159 /*
160 * Silicon does not implement ConfigData register.
161 * Set dyn_fifo to avoid reading EP config from hardware.
162 */
163 musb->dyn_fifo = true;
164
165 musb->isr = jz4740_musb_interrupt;
166
167 return 0;
168
169err_phy_power_down:
170 if (musb->phy)
171 phy_power_off(musb->phy);
172err_phy_shutdown:
173 if (musb->phy)
174 phy_exit(musb->phy);
175 return err;
176}
177
178static int jz4740_musb_exit(struct musb *musb)
179{
180 struct jz4740_glue *glue = dev_get_drvdata(musb->controller->parent);
181
182 usb_role_switch_unregister(glue->role_sw);
183 if (musb->phy) {
184 phy_power_off(musb->phy);
185 phy_exit(musb->phy);
186 }
187
188 return 0;
189}
190
191static const struct musb_platform_ops jz4740_musb_ops = {
192 .quirks = MUSB_DMA_INVENTRA | MUSB_INDEXED_EP,
193 .fifo_mode = 2,
194 .init = jz4740_musb_init,
195 .exit = jz4740_musb_exit,
196#ifdef CONFIG_USB_INVENTRA_DMA
197 .dma_init = musbhs_dma_controller_create_noirq,
198 .dma_exit = musbhs_dma_controller_destroy,
199#endif
200};
201
202static const struct musb_hdrc_platform_data jz4740_musb_pdata = {
203 .mode = MUSB_PERIPHERAL,
204 .config = &jz4740_musb_config,
205 .platform_ops = &jz4740_musb_ops,
206};
207
208static struct musb_fifo_cfg jz4770_musb_fifo_cfg[] = {
209 { .hw_ep_num = 1, .style = FIFO_TX, .maxpacket = 512, },
210 { .hw_ep_num = 1, .style = FIFO_RX, .maxpacket = 512, },
211 { .hw_ep_num = 2, .style = FIFO_TX, .maxpacket = 512, },
212 { .hw_ep_num = 2, .style = FIFO_RX, .maxpacket = 512, },
213 { .hw_ep_num = 3, .style = FIFO_TX, .maxpacket = 512, },
214 { .hw_ep_num = 3, .style = FIFO_RX, .maxpacket = 512, },
215 { .hw_ep_num = 4, .style = FIFO_TX, .maxpacket = 512, },
216 { .hw_ep_num = 4, .style = FIFO_RX, .maxpacket = 512, },
217 { .hw_ep_num = 5, .style = FIFO_TX, .maxpacket = 512, },
218 { .hw_ep_num = 5, .style = FIFO_RX, .maxpacket = 512, },
219};
220
221static struct musb_hdrc_config jz4770_musb_config = {
222 .multipoint = 1,
223 .num_eps = 11,
224 .ram_bits = 11,
225 .fifo_cfg = jz4770_musb_fifo_cfg,
226 .fifo_cfg_size = ARRAY_SIZE(jz4770_musb_fifo_cfg),
227};
228
229static const struct musb_hdrc_platform_data jz4770_musb_pdata = {
230 .mode = MUSB_PERIPHERAL, /* TODO: support OTG */
231 .config = &jz4770_musb_config,
232 .platform_ops = &jz4740_musb_ops,
233};
234
235static int jz4740_probe(struct platform_device *pdev)
236{
237 struct device *dev = &pdev->dev;
238 const struct musb_hdrc_platform_data *pdata;
239 struct platform_device *musb;
240 struct jz4740_glue *glue;
241 struct clk *clk;
242 int ret;
243
244 glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
245 if (!glue)
246 return -ENOMEM;
247
248 pdata = of_device_get_match_data(dev);
249 if (!pdata) {
250 dev_err(dev, "missing platform data\n");
251 return -EINVAL;
252 }
253
254 musb = platform_device_alloc("musb-hdrc", PLATFORM_DEVID_AUTO);
255 if (!musb) {
256 dev_err(dev, "failed to allocate musb device\n");
257 return -ENOMEM;
258 }
259
260 clk = devm_clk_get(dev, "udc");
261 if (IS_ERR(clk)) {
262 dev_err(dev, "failed to get clock\n");
263 ret = PTR_ERR(clk);
264 goto err_platform_device_put;
265 }
266
267 ret = clk_prepare_enable(clk);
268 if (ret) {
269 dev_err(dev, "failed to enable clock\n");
270 goto err_platform_device_put;
271 }
272
273 musb->dev.parent = dev;
274 musb->dev.dma_mask = &musb->dev.coherent_dma_mask;
275 musb->dev.coherent_dma_mask = DMA_BIT_MASK(32);
276 device_set_of_node_from_dev(&musb->dev, dev);
277
278 glue->pdev = musb;
279 glue->clk = clk;
280
281 platform_set_drvdata(pdev, glue);
282
283 ret = platform_device_add_resources(musb, pdev->resource,
284 pdev->num_resources);
285 if (ret) {
286 dev_err(dev, "failed to add resources\n");
287 goto err_clk_disable;
288 }
289
290 ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
291 if (ret) {
292 dev_err(dev, "failed to add platform_data\n");
293 goto err_clk_disable;
294 }
295
296 ret = platform_device_add(musb);
297 if (ret) {
298 dev_err(dev, "failed to register musb device\n");
299 goto err_clk_disable;
300 }
301
302 return 0;
303
304err_clk_disable:
305 clk_disable_unprepare(clk);
306err_platform_device_put:
307 platform_device_put(musb);
308 return ret;
309}
310
311static void jz4740_remove(struct platform_device *pdev)
312{
313 struct jz4740_glue *glue = platform_get_drvdata(pdev);
314
315 platform_device_unregister(glue->pdev);
316 clk_disable_unprepare(glue->clk);
317}
318
319static const struct of_device_id jz4740_musb_of_match[] = {
320 { .compatible = "ingenic,jz4740-musb", .data = &jz4740_musb_pdata },
321 { .compatible = "ingenic,jz4770-musb", .data = &jz4770_musb_pdata },
322 { /* sentinel */ },
323};
324MODULE_DEVICE_TABLE(of, jz4740_musb_of_match);
325
326static struct platform_driver jz4740_driver = {
327 .probe = jz4740_probe,
328 .remove_new = jz4740_remove,
329 .driver = {
330 .name = "musb-jz4740",
331 .of_match_table = jz4740_musb_of_match,
332 },
333};
334
335MODULE_DESCRIPTION("JZ4740 MUSB Glue Layer");
336MODULE_AUTHOR("Apelete Seketeli <apelete@seketeli.net>");
337MODULE_LICENSE("GPL v2");
338module_platform_driver(jz4740_driver);