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19#include <common.h>
20#include <asm/arch/cpu.h>
21#include <asm/arch/clock.h>
22#include <asm/arch/gpio.h>
23#include <asm/arch/usb_phy.h>
24#include <asm-generic/gpio.h>
25#include <dm/lists.h>
26#include <dm/root.h>
27#include <linux/usb/musb.h>
28#include "linux-compat.h"
29#include "musb_core.h"
30#include "musb_uboot.h"
31
32
33
34
35
36
37
38
39
40
41
42
43#define USBC_REG_o_ISCR 0x0400
44#define USBC_REG_o_PHYCTL 0x0404
45#define USBC_REG_o_PHYBIST 0x0408
46#define USBC_REG_o_PHYTUNE 0x040c
47
48#define USBC_REG_o_VEND0 0x0043
49
50
51#define USBC_BP_ISCR_VBUS_VALID_FROM_DATA 30
52#define USBC_BP_ISCR_VBUS_VALID_FROM_VBUS 29
53#define USBC_BP_ISCR_EXT_ID_STATUS 28
54#define USBC_BP_ISCR_EXT_DM_STATUS 27
55#define USBC_BP_ISCR_EXT_DP_STATUS 26
56#define USBC_BP_ISCR_MERGED_VBUS_STATUS 25
57#define USBC_BP_ISCR_MERGED_ID_STATUS 24
58
59#define USBC_BP_ISCR_ID_PULLUP_EN 17
60#define USBC_BP_ISCR_DPDM_PULLUP_EN 16
61#define USBC_BP_ISCR_FORCE_ID 14
62#define USBC_BP_ISCR_FORCE_VBUS_VALID 12
63#define USBC_BP_ISCR_VBUS_VALID_SRC 10
64
65#define USBC_BP_ISCR_HOSC_EN 7
66#define USBC_BP_ISCR_VBUS_CHANGE_DETECT 6
67#define USBC_BP_ISCR_ID_CHANGE_DETECT 5
68#define USBC_BP_ISCR_DPDM_CHANGE_DETECT 4
69#define USBC_BP_ISCR_IRQ_ENABLE 3
70#define USBC_BP_ISCR_VBUS_CHANGE_DETECT_EN 2
71#define USBC_BP_ISCR_ID_CHANGE_DETECT_EN 1
72#define USBC_BP_ISCR_DPDM_CHANGE_DETECT_EN 0
73
74
75
76
77
78static u32 USBC_WakeUp_ClearChangeDetect(u32 reg_val)
79{
80 u32 temp = reg_val;
81
82 temp &= ~(1 << USBC_BP_ISCR_VBUS_CHANGE_DETECT);
83 temp &= ~(1 << USBC_BP_ISCR_ID_CHANGE_DETECT);
84 temp &= ~(1 << USBC_BP_ISCR_DPDM_CHANGE_DETECT);
85
86 return temp;
87}
88
89static void USBC_EnableIdPullUp(__iomem void *base)
90{
91 u32 reg_val;
92
93 reg_val = musb_readl(base, USBC_REG_o_ISCR);
94 reg_val |= (1 << USBC_BP_ISCR_ID_PULLUP_EN);
95 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
96 musb_writel(base, USBC_REG_o_ISCR, reg_val);
97}
98
99static void USBC_EnableDpDmPullUp(__iomem void *base)
100{
101 u32 reg_val;
102
103 reg_val = musb_readl(base, USBC_REG_o_ISCR);
104 reg_val |= (1 << USBC_BP_ISCR_DPDM_PULLUP_EN);
105 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
106 musb_writel(base, USBC_REG_o_ISCR, reg_val);
107}
108
109static void USBC_ForceIdToLow(__iomem void *base)
110{
111 u32 reg_val;
112
113 reg_val = musb_readl(base, USBC_REG_o_ISCR);
114 reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_ID);
115 reg_val |= (0x02 << USBC_BP_ISCR_FORCE_ID);
116 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
117 musb_writel(base, USBC_REG_o_ISCR, reg_val);
118}
119
120static void USBC_ForceIdToHigh(__iomem void *base)
121{
122 u32 reg_val;
123
124 reg_val = musb_readl(base, USBC_REG_o_ISCR);
125 reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_ID);
126 reg_val |= (0x03 << USBC_BP_ISCR_FORCE_ID);
127 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
128 musb_writel(base, USBC_REG_o_ISCR, reg_val);
129}
130
131static void USBC_ForceVbusValidToLow(__iomem void *base)
132{
133 u32 reg_val;
134
135 reg_val = musb_readl(base, USBC_REG_o_ISCR);
136 reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID);
137 reg_val |= (0x02 << USBC_BP_ISCR_FORCE_VBUS_VALID);
138 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
139 musb_writel(base, USBC_REG_o_ISCR, reg_val);
140}
141
142static void USBC_ForceVbusValidToHigh(__iomem void *base)
143{
144 u32 reg_val;
145
146 reg_val = musb_readl(base, USBC_REG_o_ISCR);
147 reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID);
148 reg_val |= (0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID);
149 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
150 musb_writel(base, USBC_REG_o_ISCR, reg_val);
151}
152
153static void USBC_ConfigFIFO_Base(void)
154{
155 u32 reg_value;
156
157
158 reg_value = readl(SUNXI_SRAMC_BASE + 0x04);
159 reg_value &= ~(0x03 << 0);
160 reg_value |= (1 << 0);
161 writel(reg_value, SUNXI_SRAMC_BASE + 0x04);
162}
163
164
165
166
167
168static u8 last_int_usb;
169
170bool dfu_usb_get_reset(void)
171{
172 return !!(last_int_usb & MUSB_INTR_RESET);
173}
174
175
176
177
178
179static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci)
180{
181 struct musb *musb = __hci;
182 irqreturn_t retval = IRQ_NONE;
183
184
185 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
186 last_int_usb = musb->int_usb;
187 if (musb->int_usb)
188 musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
189 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
190 if (musb->int_tx)
191 musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
192 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
193 if (musb->int_rx)
194 musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);
195
196 if (musb->int_usb || musb->int_tx || musb->int_rx)
197 retval |= musb_interrupt(musb);
198
199 return retval;
200}
201
202
203static bool enabled = false;
204
205static int sunxi_musb_enable(struct musb *musb)
206{
207 int ret;
208
209 pr_debug("%s():\n", __func__);
210
211 musb_ep_select(musb->mregs, 0);
212 musb_writeb(musb->mregs, MUSB_FADDR, 0);
213
214 if (enabled)
215 return 0;
216
217
218 musb_writeb(musb->mregs, USBC_REG_o_VEND0, 0);
219
220 if (is_host_enabled(musb)) {
221 ret = sunxi_usb_phy_vbus_detect(0);
222 if (ret == 1) {
223 printf("A charger is plugged into the OTG: ");
224 return -ENODEV;
225 }
226 ret = sunxi_usb_phy_id_detect(0);
227 if (ret == 1) {
228 printf("No host cable detected: ");
229 return -ENODEV;
230 }
231 sunxi_usb_phy_power_on(0);
232 }
233
234 USBC_ForceVbusValidToHigh(musb->mregs);
235
236 enabled = true;
237 return 0;
238}
239
240static void sunxi_musb_disable(struct musb *musb)
241{
242 pr_debug("%s():\n", __func__);
243
244 if (!enabled)
245 return;
246
247 if (is_host_enabled(musb))
248 sunxi_usb_phy_power_off(0);
249
250 USBC_ForceVbusValidToLow(musb->mregs);
251 mdelay(200);
252
253 enabled = false;
254}
255
256static int sunxi_musb_init(struct musb *musb)
257{
258 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
259
260 pr_debug("%s():\n", __func__);
261
262 musb->isr = sunxi_musb_interrupt;
263
264 setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_USB0);
265#ifdef CONFIG_SUNXI_GEN_SUN6I
266 setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_GATE_OFFSET_USB0);
267#endif
268 sunxi_usb_phy_init(0);
269
270 USBC_ConfigFIFO_Base();
271 USBC_EnableDpDmPullUp(musb->mregs);
272 USBC_EnableIdPullUp(musb->mregs);
273
274 if (is_host_enabled(musb)) {
275
276 USBC_ForceIdToLow(musb->mregs);
277 } else {
278
279 USBC_ForceIdToHigh(musb->mregs);
280 }
281 USBC_ForceVbusValidToHigh(musb->mregs);
282
283 return 0;
284}
285
286static const struct musb_platform_ops sunxi_musb_ops = {
287 .init = sunxi_musb_init,
288 .enable = sunxi_musb_enable,
289 .disable = sunxi_musb_disable,
290};
291
292static struct musb_hdrc_config musb_config = {
293 .multipoint = 1,
294 .dyn_fifo = 1,
295 .num_eps = 6,
296 .ram_bits = 11,
297};
298
299static struct musb_hdrc_platform_data musb_plat = {
300#if defined(CONFIG_USB_MUSB_HOST)
301 .mode = MUSB_HOST,
302#else
303 .mode = MUSB_PERIPHERAL,
304#endif
305 .config = &musb_config,
306 .power = 250,
307 .platform_ops = &sunxi_musb_ops,
308};
309
310#ifdef CONFIG_USB_MUSB_HOST
311static int musb_usb_remove(struct udevice *dev);
312
313static int musb_usb_probe(struct udevice *dev)
314{
315 struct musb_host_data *host = dev_get_priv(dev);
316 struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
317 int ret;
318
319 priv->desc_before_addr = true;
320
321 host->host = musb_init_controller(&musb_plat, NULL,
322 (void *)SUNXI_USB0_BASE);
323 if (!host->host)
324 return -EIO;
325
326 ret = musb_lowlevel_init(host);
327 if (ret == 0)
328 printf("MUSB OTG\n");
329 else
330 musb_usb_remove(dev);
331
332 return ret;
333}
334
335static int musb_usb_remove(struct udevice *dev)
336{
337 struct musb_host_data *host = dev_get_priv(dev);
338 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
339
340 musb_stop(host->host);
341
342 sunxi_usb_phy_exit(0);
343#ifdef CONFIG_SUNXI_GEN_SUN6I
344 clrbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_GATE_OFFSET_USB0);
345#endif
346 clrbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_USB0);
347
348 free(host->host);
349 host->host = NULL;
350
351 return 0;
352}
353
354U_BOOT_DRIVER(usb_musb) = {
355 .name = "sunxi-musb",
356 .id = UCLASS_USB,
357 .probe = musb_usb_probe,
358 .remove = musb_usb_remove,
359 .ops = &musb_usb_ops,
360 .platdata_auto_alloc_size = sizeof(struct usb_platdata),
361 .priv_auto_alloc_size = sizeof(struct musb_host_data),
362};
363#endif
364
365void sunxi_musb_board_init(void)
366{
367#ifdef CONFIG_USB_MUSB_HOST
368 struct udevice *dev;
369
370
371
372
373
374
375
376 device_bind_driver(dm_root(), "sunxi-musb", "sunxi-musb", &dev);
377#else
378 musb_register(&musb_plat, NULL, (void *)SUNXI_USB0_BASE);
379#endif
380}
381
