1 /*
2 * powertv-usb.c
3 *
4 * Description: ASIC-specific USB device setup and shutdown
5 *
6 * Copyright (C) 2005-2009 Scientific-Atlanta, Inc.
7 * Copyright (C) 2009 Cisco Systems, Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 *
23 * Author: Ken Eppinett
24 * David Schleef <ds@schleef.org>
25 *
26 * NOTE: The bootloader allocates persistent memory at an address which is
27 * 16 MiB below the end of the highest address in KSEG0. All fixed
28 * address memory reservations must avoid this region.
29 */
30
31 #include <linux/kernel.h>
32 #include <linux/export.h>
33 #include <linux/ioport.h>
34 #include <linux/platform_device.h>
35 #include <asm/mach-powertv/asic.h>
36 #include <asm/mach-powertv/interrupts.h>
37
38 /* misc_clk_ctl1 values */
39 #define MCC1_30MHZ_POWERUP_SELECT (1 << 14)
40 #define MCC1_DIV9 (1 << 13)
41 #define MCC1_ETHMIPS_POWERUP_SELECT (1 << 11)
42 #define MCC1_USB_POWERUP_SELECT (1 << 1)
43 #define MCC1_CLOCK108_POWERUP_SELECT (1 << 0)
44
45 /* Possible values for clock select */
46 #define MCC1_USB_CLOCK_HIGH_Z (0 << 4)
47 #define MCC1_USB_CLOCK_48MHZ (1 << 4)
48 #define MCC1_USB_CLOCK_24MHZ (2 << 4)
49 #define MCC1_USB_CLOCK_6MHZ (3 << 4)
50
51 #define MCC1_CONFIG (MCC1_30MHZ_POWERUP_SELECT | \
52 MCC1_DIV9 | \
53 MCC1_ETHMIPS_POWERUP_SELECT | \
54 MCC1_USB_POWERUP_SELECT | \
55 MCC1_CLOCK108_POWERUP_SELECT)
56
57 /* misc_clk_ctl2 values */
58 #define MCC2_GMII_GCLK_TO_PAD (1 << 31)
59 #define MCC2_ETHER125_0_CLOCK_SELECT (1 << 29)
60 #define MCC2_RMII_0_CLOCK_SELECT (1 << 28)
61 #define MCC2_GMII_TX0_CLOCK_SELECT (1 << 27)
62 #define MCC2_GMII_RX0_CLOCK_SELECT (1 << 26)
63 #define MCC2_ETHER125_1_CLOCK_SELECT (1 << 24)
64 #define MCC2_RMII_1_CLOCK_SELECT (1 << 23)
65 #define MCC2_GMII_TX1_CLOCK_SELECT (1 << 22)
66 #define MCC2_GMII_RX1_CLOCK_SELECT (1 << 21)
67 #define MCC2_ETHER125_2_CLOCK_SELECT (1 << 19)
68 #define MCC2_RMII_2_CLOCK_SELECT (1 << 18)
69 #define MCC2_GMII_TX2_CLOCK_SELECT (1 << 17)
70 #define MCC2_GMII_RX2_CLOCK_SELECT (1 << 16)
71
72 #define ETHER_CLK_CONFIG (MCC2_GMII_GCLK_TO_PAD | \
73 MCC2_ETHER125_0_CLOCK_SELECT | \
74 MCC2_RMII_0_CLOCK_SELECT | \
75 MCC2_GMII_TX0_CLOCK_SELECT | \
76 MCC2_GMII_RX0_CLOCK_SELECT | \
77 MCC2_ETHER125_1_CLOCK_SELECT | \
78 MCC2_RMII_1_CLOCK_SELECT | \
79 MCC2_GMII_TX1_CLOCK_SELECT | \
80 MCC2_GMII_RX1_CLOCK_SELECT | \
81 MCC2_ETHER125_2_CLOCK_SELECT | \
82 MCC2_RMII_2_CLOCK_SELECT | \
83 MCC2_GMII_TX2_CLOCK_SELECT | \
84 MCC2_GMII_RX2_CLOCK_SELECT)
85
86 /* misc_clk_ctl2 definitions for Gaia */
87 #define FSX4A_REF_SELECT (1 << 16)
88 #define FSX4B_REF_SELECT (1 << 17)
89 #define FSX4C_REF_SELECT (1 << 18)
90 #define DDR_PLL_REF_SELECT (1 << 19)
91 #define MIPS_PLL_REF_SELECT (1 << 20)
92
93 /* Definitions for the QAM frequency select register FS432X4A4_QAM_CTL */
94 #define QAM_FS_SDIV_SHIFT 29
95 #define QAM_FS_MD_SHIFT 24
96 #define QAM_FS_MD_MASK 0x1f /* Cut down to 5 bits */
97 #define QAM_FS_PE_SHIFT 8
98
99 #define QAM_FS_DISABLE_DIVIDE_BY_3 (1 << 5)
100 #define QAM_FS_ENABLE_PROGRAM (1 << 4)
101 #define QAM_FS_ENABLE_OUTPUT (1 << 3)
102 #define QAM_FS_SELECT_TEST_BYPASS (1 << 2)
103 #define QAM_FS_DISABLE_DIGITAL_STANDBY (1 << 1)
104 #define QAM_FS_CHOOSE_FS (1 << 0)
105
106 /* Definitions for fs432x4a_ctl register */
107 #define QAM_FS_NSDIV_54MHZ (1 << 2)
108
109 /* Definitions for bcm1_usb2_ctl register */
110 #define BCM1_USB2_CTL_BISTOK (1 << 11)
111 #define BCM1_USB2_CTL_PORT2_SHIFT_JK (1 << 7)
112 #define BCM1_USB2_CTL_PORT1_SHIFT_JK (1 << 6)
113 #define BCM1_USB2_CTL_PORT2_FAST_EDGE (1 << 5)
114 #define BCM1_USB2_CTL_PORT1_FAST_EDGE (1 << 4)
115 #define BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH (1 << 1)
116 #define BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH (1 << 0)
117
118 /* Definitions for crt_spare register */
119 #define CRT_SPARE_PORT2_SHIFT_JK (1 << 21)
120 #define CRT_SPARE_PORT1_SHIFT_JK (1 << 20)
121 #define CRT_SPARE_PORT2_FAST_EDGE (1 << 19)
122 #define CRT_SPARE_PORT1_FAST_EDGE (1 << 18)
123 #define CRT_SPARE_DIVIDE_BY_9_FROM_432 (1 << 17)
124 #define CRT_SPARE_USB_DIVIDE_BY_9 (1 << 16)
125
126 /* Definitions for usb2_stbus_obc register */
127 #define USB_STBUS_OBC_STORE32_LOAD32 0x3
128
129 /* Definitions for usb2_stbus_mess_size register */
130 #define USB2_STBUS_MESS_SIZE_2 0x1 /* 2 packets */
131
132 /* Definitions for usb2_stbus_chunk_size register */
133 #define USB2_STBUS_CHUNK_SIZE_2 0x1 /* 2 packets */
134
135 /* Definitions for usb2_strap register */
136 #define USB2_STRAP_HFREQ_SELECT 0x1
137
138 /*
139 * USB Host Resource Definition
140 */
141
142 static struct resource ehci_resources[] = {
143 {
144 .parent = &asic_resource,
145 .start = 0,
146 .end = 0xff,
147 .flags = IORESOURCE_MEM,
148 },
149 {
150 .start = irq_usbehci,
151 .end = irq_usbehci,
152 .flags = IORESOURCE_IRQ,
153 },
154 };
155
156 static u64 ehci_dmamask = 0xffffffffULL;
157
158 static struct platform_device ehci_device = {
159 .name = "powertv-ehci",
160 .id = 0,
161 .num_resources = 2,
162 .resource = ehci_resources,
163 .dev = {
164 .dma_mask = &ehci_dmamask,
165 .coherent_dma_mask = 0xffffffff,
166 },
167 };
168
169 static struct resource ohci_resources[] = {
170 {
171 .parent = &asic_resource,
172 .start = 0,
173 .end = 0xff,
174 .flags = IORESOURCE_MEM,
175 },
176 {
177 .start = irq_usbohci,
178 .end = irq_usbohci,
179 .flags = IORESOURCE_IRQ,
180 },
181 };
182
183 static u64 ohci_dmamask = 0xffffffffULL;
184
185 static struct platform_device ohci_device = {
186 .name = "powertv-ohci",
187 .id = 0,
188 .num_resources = 2,
189 .resource = ohci_resources,
190 .dev = {
191 .dma_mask = &ohci_dmamask,
192 .coherent_dma_mask = 0xffffffff,
193 },
194 };
195
196 static unsigned usb_users;
197 static DEFINE_SPINLOCK(usb_regs_lock);
198
199 /*
200 *
201 * fs_update - set frequency synthesizer for USB
202 * @pe_bits Phase tap setting
203 * @md_bits Coarse selector bus for algorithm of phase tap
204 * @sdiv_bits Output divider setting
205 * @disable_div_by_3 Either QAM_FS_DISABLE_DIVIDE_BY_3 or zero
206 * @standby Either QAM_FS_DISABLE_DIGITAL_STANDBY or zero
207 *
208 * QAM frequency selection code, which affects the frequency at which USB
209 * runs. The frequency is calculated as:
210 * 2^15 * ndiv * Fin
211 * Fout = ------------------------------------------------------------
212 * (sdiv * (ipe * (1 + md/32) - (ipe - 2^15)*(1 + (md + 1)/32)))
213 * where:
214 * Fin 54 MHz
215 * ndiv QAM_FS_NSDIV_54MHZ ? 8 : 16
216 * sdiv 1 << (sdiv_bits + 1)
217 * ipe Same as pe_bits
218 * md A five-bit, two's-complement integer (range [-16, 15]), which
219 * is the lower 5 bits of md_bits.
220 */
fs_update(u32 pe_bits,int md_bits,u32 sdiv_bits,u32 disable_div_by_3,u32 standby)221 static void fs_update(u32 pe_bits, int md_bits, u32 sdiv_bits,
222 u32 disable_div_by_3, u32 standby)
223 {
224 u32 val;
225
226 val = ((sdiv_bits << QAM_FS_SDIV_SHIFT) |
227 ((md_bits & QAM_FS_MD_MASK) << QAM_FS_MD_SHIFT) |
228 (pe_bits << QAM_FS_PE_SHIFT) |
229 QAM_FS_ENABLE_OUTPUT |
230 standby |
231 disable_div_by_3);
232 asic_write(val, fs432x4b4_usb_ctl);
233 asic_write(val | QAM_FS_ENABLE_PROGRAM, fs432x4b4_usb_ctl);
234 asic_write(val | QAM_FS_ENABLE_PROGRAM | QAM_FS_CHOOSE_FS,
235 fs432x4b4_usb_ctl);
236 }
237
238 /*
239 * usb_eye_configure - for optimizing the shape USB eye waveform
240 * @set: Bits to set in the register
241 * @clear: Bits to clear in the register; each bit with a one will
242 * be set in the register, zero bits will not be modified
243 */
usb_eye_configure(u32 set,u32 clear)244 static void usb_eye_configure(u32 set, u32 clear)
245 {
246 u32 old;
247
248 old = asic_read(crt_spare);
249 old |= set;
250 old &= ~clear;
251 asic_write(old, crt_spare);
252 }
253
254 /*
255 * platform_configure_usb - usb configuration based on platform type.
256 */
platform_configure_usb(void)257 static void platform_configure_usb(void)
258 {
259 u32 bcm1_usb2_ctl_value;
260 enum asic_type asic_type;
261 unsigned long flags;
262
263 spin_lock_irqsave(&usb_regs_lock, flags);
264 usb_users++;
265
266 if (usb_users != 1) {
267 spin_unlock_irqrestore(&usb_regs_lock, flags);
268 return;
269 }
270
271 asic_type = platform_get_asic();
272
273 switch (asic_type) {
274 case ASIC_ZEUS:
275 fs_update(0x0000, -15, 0x02, 0, 0);
276 bcm1_usb2_ctl_value = BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH |
277 BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH;
278 break;
279
280 case ASIC_CRONUS:
281 case ASIC_CRONUSLITE:
282 usb_eye_configure(0, CRT_SPARE_USB_DIVIDE_BY_9);
283 fs_update(0x8000, -14, 0x03, QAM_FS_DISABLE_DIVIDE_BY_3,
284 QAM_FS_DISABLE_DIGITAL_STANDBY);
285 bcm1_usb2_ctl_value = BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH |
286 BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH;
287 break;
288
289 case ASIC_CALLIOPE:
290 fs_update(0x0000, -15, 0x02, QAM_FS_DISABLE_DIVIDE_BY_3,
291 QAM_FS_DISABLE_DIGITAL_STANDBY);
292
293 switch (platform_get_family()) {
294 case FAMILY_1500VZE:
295 break;
296
297 case FAMILY_1500VZF:
298 usb_eye_configure(CRT_SPARE_PORT2_SHIFT_JK |
299 CRT_SPARE_PORT1_SHIFT_JK |
300 CRT_SPARE_PORT2_FAST_EDGE |
301 CRT_SPARE_PORT1_FAST_EDGE, 0);
302 break;
303
304 default:
305 usb_eye_configure(CRT_SPARE_PORT2_SHIFT_JK |
306 CRT_SPARE_PORT1_SHIFT_JK, 0);
307 break;
308 }
309
310 bcm1_usb2_ctl_value = BCM1_USB2_CTL_BISTOK |
311 BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH |
312 BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH;
313 break;
314
315 case ASIC_GAIA:
316 fs_update(0x8000, -14, 0x03, QAM_FS_DISABLE_DIVIDE_BY_3,
317 QAM_FS_DISABLE_DIGITAL_STANDBY);
318 bcm1_usb2_ctl_value = BCM1_USB2_CTL_BISTOK |
319 BCM1_USB2_CTL_EHCI_PRT_PWR_ACTIVE_HIGH |
320 BCM1_USB2_CTL_APP_PRT_OVRCUR_IN_ACTIVE_HIGH;
321 break;
322
323 default:
324 pr_err("Unknown ASIC type: %d\n", asic_type);
325 bcm1_usb2_ctl_value = 0;
326 break;
327 }
328
329 /* turn on USB power */
330 asic_write(0, usb2_strap);
331 /* Enable all OHCI interrupts */
332 asic_write(bcm1_usb2_ctl_value, usb2_control);
333 /* usb2_stbus_obc store32/load32 */
334 asic_write(USB_STBUS_OBC_STORE32_LOAD32, usb2_stbus_obc);
335 /* usb2_stbus_mess_size 2 packets */
336 asic_write(USB2_STBUS_MESS_SIZE_2, usb2_stbus_mess_size);
337 /* usb2_stbus_chunk_size 2 packets */
338 asic_write(USB2_STBUS_CHUNK_SIZE_2, usb2_stbus_chunk_size);
339 spin_unlock_irqrestore(&usb_regs_lock, flags);
340 }
341
platform_unconfigure_usb(void)342 static void platform_unconfigure_usb(void)
343 {
344 unsigned long flags;
345
346 spin_lock_irqsave(&usb_regs_lock, flags);
347 usb_users--;
348 if (usb_users == 0)
349 asic_write(USB2_STRAP_HFREQ_SELECT, usb2_strap);
350 spin_unlock_irqrestore(&usb_regs_lock, flags);
351 }
352
353 /*
354 * Set up the USB EHCI interface
355 */
platform_configure_usb_ehci()356 void platform_configure_usb_ehci()
357 {
358 platform_configure_usb();
359 }
360 EXPORT_SYMBOL(platform_configure_usb_ehci);
361
362 /*
363 * Set up the USB OHCI interface
364 */
platform_configure_usb_ohci()365 void platform_configure_usb_ohci()
366 {
367 platform_configure_usb();
368 }
369 EXPORT_SYMBOL(platform_configure_usb_ohci);
370
371 /*
372 * Shut the USB EHCI interface down
373 */
platform_unconfigure_usb_ehci()374 void platform_unconfigure_usb_ehci()
375 {
376 platform_unconfigure_usb();
377 }
378 EXPORT_SYMBOL(platform_unconfigure_usb_ehci);
379
380 /*
381 * Shut the USB OHCI interface down
382 */
platform_unconfigure_usb_ohci()383 void platform_unconfigure_usb_ohci()
384 {
385 platform_unconfigure_usb();
386 }
387 EXPORT_SYMBOL(platform_unconfigure_usb_ohci);
388
389 /**
390 * platform_devices_init - sets up USB device resourse.
391 */
platform_usb_devices_init(struct platform_device ** ehci_dev,struct platform_device ** ohci_dev)392 int __init platform_usb_devices_init(struct platform_device **ehci_dev,
393 struct platform_device **ohci_dev)
394 {
395 *ehci_dev = &ehci_device;
396 ehci_resources[0].start = asic_reg_phys_addr(ehci_hcapbase);
397 ehci_resources[0].end += ehci_resources[0].start;
398
399 *ohci_dev = &ohci_device;
400 ohci_resources[0].start = asic_reg_phys_addr(ohci_hc_revision);
401 ohci_resources[0].end += ohci_resources[0].start;
402
403 return 0;
404 }
405