2 * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/malloc.h>
37 #include <sys/timeet.h>
38 #include <sys/timetc.h>
39 #include <sys/watchdog.h>
40 #include <machine/bus.h>
41 #include <machine/cpu.h>
42 #include <machine/intr.h>
44 #include <arm/ti/tivar.h>
45 #include <arm/ti/ti_scm.h>
46 #include <arm/ti/ti_prcm.h>
48 #include <dev/fdt/fdt_common.h>
49 #include <dev/ofw/openfirm.h>
50 #include <dev/ofw/ofw_bus.h>
51 #include <dev/ofw/ofw_bus_subr.h>
53 #include <machine/bus.h>
55 #include "am335x_scm.h"
58 #define CM_PER_L4LS_CLKSTCTRL (CM_PER + 0x000)
59 #define CM_PER_L3S_CLKSTCTRL (CM_PER + 0x004)
60 #define CM_PER_L3_CLKSTCTRL (CM_PER + 0x00C)
61 #define CM_PER_CPGMAC0_CLKCTRL (CM_PER + 0x014)
62 #define CM_PER_LCDC_CLKCTRL (CM_PER + 0x018)
63 #define CM_PER_USB0_CLKCTRL (CM_PER + 0x01C)
64 #define CM_PER_TPTC0_CLKCTRL (CM_PER + 0x024)
65 #define CM_PER_UART5_CLKCTRL (CM_PER + 0x038)
66 #define CM_PER_MMC0_CLKCTRL (CM_PER + 0x03C)
67 #define CM_PER_I2C2_CLKCTRL (CM_PER + 0x044)
68 #define CM_PER_I2C1_CLKCTRL (CM_PER + 0x048)
69 #define CM_PER_SPI0_CLKCTRL (CM_PER + 0x04C)
70 #define CM_PER_SPI1_CLKCTRL (CM_PER + 0x050)
71 #define CM_PER_UART1_CLKCTRL (CM_PER + 0x06C)
72 #define CM_PER_UART2_CLKCTRL (CM_PER + 0x070)
73 #define CM_PER_UART3_CLKCTRL (CM_PER + 0x074)
74 #define CM_PER_UART4_CLKCTRL (CM_PER + 0x078)
75 #define CM_PER_TIMER7_CLKCTRL (CM_PER + 0x07C)
76 #define CM_PER_TIMER2_CLKCTRL (CM_PER + 0x080)
77 #define CM_PER_TIMER3_CLKCTRL (CM_PER + 0x084)
78 #define CM_PER_TIMER4_CLKCTRL (CM_PER + 0x088)
79 #define CM_PER_GPIO1_CLKCTRL (CM_PER + 0x0AC)
80 #define CM_PER_GPIO2_CLKCTRL (CM_PER + 0x0B0)
81 #define CM_PER_GPIO3_CLKCTRL (CM_PER + 0x0B4)
82 #define CM_PER_TPCC_CLKCTRL (CM_PER + 0x0BC)
83 #define CM_PER_EPWMSS1_CLKCTRL (CM_PER + 0x0CC)
84 #define CM_PER_EPWMSS0_CLKCTRL (CM_PER + 0x0D4)
85 #define CM_PER_EPWMSS2_CLKCTRL (CM_PER + 0x0D8)
86 #define CM_PER_L3_INSTR_CLKCTRL (CM_PER + 0x0DC)
87 #define CM_PER_L3_CLKCTRL (CM_PER + 0x0E0)
88 #define CM_PER_PRUSS_CLKCTRL (CM_PER + 0x0E8)
89 #define CM_PER_TIMER5_CLKCTRL (CM_PER + 0x0EC)
90 #define CM_PER_TIMER6_CLKCTRL (CM_PER + 0x0F0)
91 #define CM_PER_MMC1_CLKCTRL (CM_PER + 0x0F4)
92 #define CM_PER_MMC2_CLKCTRL (CM_PER + 0x0F8)
93 #define CM_PER_TPTC1_CLKCTRL (CM_PER + 0x0FC)
94 #define CM_PER_TPTC2_CLKCTRL (CM_PER + 0x100)
95 #define CM_PER_SPINLOCK0_CLKCTRL (CM_PER + 0x10C)
96 #define CM_PER_MAILBOX0_CLKCTRL (CM_PER + 0x110)
97 #define CM_PER_OCPWP_L3_CLKSTCTRL (CM_PER + 0x12C)
98 #define CM_PER_OCPWP_CLKCTRL (CM_PER + 0x130)
99 #define CM_PER_CPSW_CLKSTCTRL (CM_PER + 0x144)
100 #define CM_PER_PRUSS_CLKSTCTRL (CM_PER + 0x140)
102 #define CM_WKUP 0x400
103 #define CM_WKUP_CLKSTCTRL (CM_WKUP + 0x000)
104 #define CM_WKUP_CONTROL_CLKCTRL (CM_WKUP + 0x004)
105 #define CM_WKUP_GPIO0_CLKCTRL (CM_WKUP + 0x008)
106 #define CM_WKUP_CM_L3_AON_CLKSTCTRL (CM_WKUP + 0x01C)
107 #define CM_WKUP_CM_CLKSEL_DPLL_MPU (CM_WKUP + 0x02C)
108 #define CM_WKUP_CM_IDLEST_DPLL_DISP (CM_WKUP + 0x048)
109 #define CM_WKUP_CM_CLKSEL_DPLL_DISP (CM_WKUP + 0x054)
110 #define CM_WKUP_CM_CLKDCOLDO_DPLL_PER (CM_WKUP + 0x07C)
111 #define CM_WKUP_CM_CLKMODE_DPLL_DISP (CM_WKUP + 0x098)
112 #define CM_WKUP_I2C0_CLKCTRL (CM_WKUP + 0x0B8)
113 #define CM_WKUP_ADC_TSC_CLKCTRL (CM_WKUP + 0x0BC)
115 #define CM_DPLL 0x500
116 #define CLKSEL_TIMER7_CLK (CM_DPLL + 0x004)
117 #define CLKSEL_TIMER2_CLK (CM_DPLL + 0x008)
118 #define CLKSEL_TIMER3_CLK (CM_DPLL + 0x00C)
119 #define CLKSEL_TIMER4_CLK (CM_DPLL + 0x010)
120 #define CLKSEL_TIMER5_CLK (CM_DPLL + 0x018)
121 #define CLKSEL_TIMER6_CLK (CM_DPLL + 0x01C)
122 #define CLKSEL_PRUSS_OCP_CLK (CM_DPLL + 0x030)
125 #define CM_RTC_RTC_CLKCTRL (CM_RTC + 0x000)
126 #define CM_RTC_CLKSTCTRL (CM_RTC + 0x004)
128 #define PRM_PER 0xC00
129 #define PRM_PER_RSTCTRL (PRM_PER + 0x00)
131 #define PRM_DEVICE_OFFSET 0xF00
132 #define PRM_RSTCTRL (PRM_DEVICE_OFFSET + 0x00)
134 struct am335x_prcm_softc {
135 struct resource * res[2];
137 bus_space_handle_t bsh;
140 static struct resource_spec am335x_prcm_spec[] = {
141 { SYS_RES_MEMORY, 0, RF_ACTIVE },
145 static struct am335x_prcm_softc *am335x_prcm_sc = NULL;
147 static int am335x_clk_noop_activate(struct ti_clock_dev *clkdev);
148 static int am335x_clk_generic_activate(struct ti_clock_dev *clkdev);
149 static int am335x_clk_gpio_activate(struct ti_clock_dev *clkdev);
150 static int am335x_clk_noop_deactivate(struct ti_clock_dev *clkdev);
151 static int am335x_clk_generic_deactivate(struct ti_clock_dev *clkdev);
152 static int am335x_clk_noop_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc);
153 static int am335x_clk_generic_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc);
154 static int am335x_clk_hsmmc_get_source_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
155 static int am335x_clk_get_sysclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
156 static int am335x_clk_get_arm_fclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
157 static int am335x_clk_get_arm_disp_freq(struct ti_clock_dev *clkdev, unsigned int *freq);
158 static int am335x_clk_set_arm_disp_freq(struct ti_clock_dev *clkdev, unsigned int freq);
159 static void am335x_prcm_reset(void);
160 static int am335x_clk_cpsw_activate(struct ti_clock_dev *clkdev);
161 static int am335x_clk_musb0_activate(struct ti_clock_dev *clkdev);
162 static int am335x_clk_lcdc_activate(struct ti_clock_dev *clkdev);
163 static int am335x_clk_pruss_activate(struct ti_clock_dev *clkdev);
165 #define AM335X_NOOP_CLOCK_DEV(i) \
167 .clk_activate = am335x_clk_noop_activate, \
168 .clk_deactivate = am335x_clk_noop_deactivate, \
169 .clk_set_source = am335x_clk_noop_set_source, \
170 .clk_accessible = NULL, \
171 .clk_get_source_freq = NULL, \
172 .clk_set_source_freq = NULL \
175 #define AM335X_GENERIC_CLOCK_DEV(i) \
177 .clk_activate = am335x_clk_generic_activate, \
178 .clk_deactivate = am335x_clk_generic_deactivate, \
179 .clk_set_source = am335x_clk_generic_set_source, \
180 .clk_accessible = NULL, \
181 .clk_get_source_freq = NULL, \
182 .clk_set_source_freq = NULL \
185 #define AM335X_GPIO_CLOCK_DEV(i) \
187 .clk_activate = am335x_clk_gpio_activate, \
188 .clk_deactivate = am335x_clk_generic_deactivate, \
189 .clk_set_source = am335x_clk_generic_set_source, \
190 .clk_accessible = NULL, \
191 .clk_get_source_freq = NULL, \
192 .clk_set_source_freq = NULL \
195 #define AM335X_MMCHS_CLOCK_DEV(i) \
197 .clk_activate = am335x_clk_generic_activate, \
198 .clk_deactivate = am335x_clk_generic_deactivate, \
199 .clk_set_source = am335x_clk_generic_set_source, \
200 .clk_accessible = NULL, \
201 .clk_get_source_freq = am335x_clk_hsmmc_get_source_freq, \
202 .clk_set_source_freq = NULL \
205 struct ti_clock_dev ti_am335x_clk_devmap[] = {
208 .clk_activate = NULL,
209 .clk_deactivate = NULL,
210 .clk_set_source = NULL,
211 .clk_accessible = NULL,
212 .clk_get_source_freq = am335x_clk_get_sysclk_freq,
213 .clk_set_source_freq = NULL,
215 /* MPU (ARM) core clocks */
217 .clk_activate = NULL,
218 .clk_deactivate = NULL,
219 .clk_set_source = NULL,
220 .clk_accessible = NULL,
221 .clk_get_source_freq = am335x_clk_get_arm_fclk_freq,
222 .clk_set_source_freq = NULL,
224 /* CPSW Ethernet Switch core clocks */
226 .clk_activate = am335x_clk_cpsw_activate,
227 .clk_deactivate = NULL,
228 .clk_set_source = NULL,
229 .clk_accessible = NULL,
230 .clk_get_source_freq = NULL,
231 .clk_set_source_freq = NULL,
234 /* Mentor USB HS controller core clocks */
236 .clk_activate = am335x_clk_musb0_activate,
237 .clk_deactivate = NULL,
238 .clk_set_source = NULL,
239 .clk_accessible = NULL,
240 .clk_get_source_freq = NULL,
241 .clk_set_source_freq = NULL,
244 /* LCD controller clocks */
246 .clk_activate = am335x_clk_lcdc_activate,
247 .clk_deactivate = NULL,
248 .clk_set_source = NULL,
249 .clk_accessible = NULL,
250 .clk_get_source_freq = am335x_clk_get_arm_disp_freq,
251 .clk_set_source_freq = am335x_clk_set_arm_disp_freq,
255 AM335X_NOOP_CLOCK_DEV(UART1_CLK),
256 AM335X_GENERIC_CLOCK_DEV(UART2_CLK),
257 AM335X_GENERIC_CLOCK_DEV(UART3_CLK),
258 AM335X_GENERIC_CLOCK_DEV(UART4_CLK),
259 AM335X_GENERIC_CLOCK_DEV(UART5_CLK),
260 AM335X_GENERIC_CLOCK_DEV(UART6_CLK),
263 AM335X_GENERIC_CLOCK_DEV(TIMER2_CLK),
264 AM335X_GENERIC_CLOCK_DEV(TIMER3_CLK),
265 AM335X_GENERIC_CLOCK_DEV(TIMER4_CLK),
266 AM335X_GENERIC_CLOCK_DEV(TIMER5_CLK),
267 AM335X_GENERIC_CLOCK_DEV(TIMER6_CLK),
268 AM335X_GENERIC_CLOCK_DEV(TIMER7_CLK),
270 /* GPIO, we use hwmods as reference, not units in spec */
271 AM335X_GPIO_CLOCK_DEV(GPIO1_CLK),
272 AM335X_GPIO_CLOCK_DEV(GPIO2_CLK),
273 AM335X_GPIO_CLOCK_DEV(GPIO3_CLK),
274 AM335X_GPIO_CLOCK_DEV(GPIO4_CLK),
276 /* I2C we use hwmods as reference, not units in spec */
277 AM335X_GENERIC_CLOCK_DEV(I2C1_CLK),
278 AM335X_GENERIC_CLOCK_DEV(I2C2_CLK),
279 AM335X_GENERIC_CLOCK_DEV(I2C3_CLK),
281 /* McSPI we use hwmods as reference, not units in spec */
282 AM335X_GENERIC_CLOCK_DEV(SPI0_CLK),
283 AM335X_GENERIC_CLOCK_DEV(SPI1_CLK),
286 AM335X_GENERIC_CLOCK_DEV(TSC_ADC_CLK),
289 AM335X_GENERIC_CLOCK_DEV(EDMA_TPCC_CLK),
290 AM335X_GENERIC_CLOCK_DEV(EDMA_TPTC0_CLK),
291 AM335X_GENERIC_CLOCK_DEV(EDMA_TPTC1_CLK),
292 AM335X_GENERIC_CLOCK_DEV(EDMA_TPTC2_CLK),
295 AM335X_MMCHS_CLOCK_DEV(MMC1_CLK),
296 AM335X_MMCHS_CLOCK_DEV(MMC2_CLK),
297 AM335X_MMCHS_CLOCK_DEV(MMC3_CLK),
300 AM335X_GENERIC_CLOCK_DEV(PWMSS0_CLK),
301 AM335X_GENERIC_CLOCK_DEV(PWMSS1_CLK),
302 AM335X_GENERIC_CLOCK_DEV(PWMSS2_CLK),
304 /* System Mailbox clock */
305 AM335X_GENERIC_CLOCK_DEV(MAILBOX0_CLK),
308 AM335X_GENERIC_CLOCK_DEV(SPINLOCK0_CLK),
312 .clk_activate = am335x_clk_pruss_activate,
313 .clk_deactivate = NULL,
314 .clk_set_source = NULL,
315 .clk_accessible = NULL,
316 .clk_get_source_freq = NULL,
317 .clk_set_source_freq = NULL,
321 AM335X_GENERIC_CLOCK_DEV(RTC_CLK),
323 { INVALID_CLK_IDENT, NULL, NULL, NULL, NULL }
326 struct am335x_clk_details {
328 uint32_t clkctrl_reg;
332 #define _CLK_DETAIL(i, c, s) \
334 .clkctrl_reg = (c), \
338 static struct am335x_clk_details g_am335x_clk_details[] = {
340 /* UART. UART0 clock not controllable. */
341 _CLK_DETAIL(UART1_CLK, 0, 0),
342 _CLK_DETAIL(UART2_CLK, CM_PER_UART1_CLKCTRL, 0),
343 _CLK_DETAIL(UART3_CLK, CM_PER_UART2_CLKCTRL, 0),
344 _CLK_DETAIL(UART4_CLK, CM_PER_UART3_CLKCTRL, 0),
345 _CLK_DETAIL(UART5_CLK, CM_PER_UART4_CLKCTRL, 0),
346 _CLK_DETAIL(UART6_CLK, CM_PER_UART5_CLKCTRL, 0),
348 /* DMTimer modules */
349 _CLK_DETAIL(TIMER2_CLK, CM_PER_TIMER2_CLKCTRL, CLKSEL_TIMER2_CLK),
350 _CLK_DETAIL(TIMER3_CLK, CM_PER_TIMER3_CLKCTRL, CLKSEL_TIMER3_CLK),
351 _CLK_DETAIL(TIMER4_CLK, CM_PER_TIMER4_CLKCTRL, CLKSEL_TIMER4_CLK),
352 _CLK_DETAIL(TIMER5_CLK, CM_PER_TIMER5_CLKCTRL, CLKSEL_TIMER5_CLK),
353 _CLK_DETAIL(TIMER6_CLK, CM_PER_TIMER6_CLKCTRL, CLKSEL_TIMER6_CLK),
354 _CLK_DETAIL(TIMER7_CLK, CM_PER_TIMER7_CLKCTRL, CLKSEL_TIMER7_CLK),
356 /* GPIO modules, hwmods start with gpio1 */
357 _CLK_DETAIL(GPIO1_CLK, CM_WKUP_GPIO0_CLKCTRL, 0),
358 _CLK_DETAIL(GPIO2_CLK, CM_PER_GPIO1_CLKCTRL, 0),
359 _CLK_DETAIL(GPIO3_CLK, CM_PER_GPIO2_CLKCTRL, 0),
360 _CLK_DETAIL(GPIO4_CLK, CM_PER_GPIO3_CLKCTRL, 0),
362 /* I2C modules, hwmods start with i2c1 */
363 _CLK_DETAIL(I2C1_CLK, CM_WKUP_I2C0_CLKCTRL, 0),
364 _CLK_DETAIL(I2C2_CLK, CM_PER_I2C1_CLKCTRL, 0),
365 _CLK_DETAIL(I2C3_CLK, CM_PER_I2C2_CLKCTRL, 0),
367 /* McSPI modules, hwmods start with spi0 */
368 _CLK_DETAIL(SPI0_CLK, CM_PER_SPI0_CLKCTRL, 0),
369 _CLK_DETAIL(SPI1_CLK, CM_PER_SPI1_CLKCTRL, 0),
372 _CLK_DETAIL(TSC_ADC_CLK, CM_WKUP_ADC_TSC_CLKCTRL, 0),
375 _CLK_DETAIL(EDMA_TPCC_CLK, CM_PER_TPCC_CLKCTRL, 0),
376 _CLK_DETAIL(EDMA_TPTC0_CLK, CM_PER_TPTC0_CLKCTRL, 0),
377 _CLK_DETAIL(EDMA_TPTC1_CLK, CM_PER_TPTC1_CLKCTRL, 0),
378 _CLK_DETAIL(EDMA_TPTC2_CLK, CM_PER_TPTC2_CLKCTRL, 0),
380 /* MMCHS modules, hwmods start with mmc1*/
381 _CLK_DETAIL(MMC1_CLK, CM_PER_MMC0_CLKCTRL, 0),
382 _CLK_DETAIL(MMC2_CLK, CM_PER_MMC1_CLKCTRL, 0),
383 _CLK_DETAIL(MMC3_CLK, CM_PER_MMC1_CLKCTRL, 0),
386 _CLK_DETAIL(PWMSS0_CLK, CM_PER_EPWMSS0_CLKCTRL, 0),
387 _CLK_DETAIL(PWMSS1_CLK, CM_PER_EPWMSS1_CLKCTRL, 0),
388 _CLK_DETAIL(PWMSS2_CLK, CM_PER_EPWMSS2_CLKCTRL, 0),
390 _CLK_DETAIL(MAILBOX0_CLK, CM_PER_MAILBOX0_CLKCTRL, 0),
391 _CLK_DETAIL(SPINLOCK0_CLK, CM_PER_SPINLOCK0_CLKCTRL, 0),
394 _CLK_DETAIL(RTC_CLK, CM_RTC_RTC_CLKCTRL, 0),
396 { INVALID_CLK_IDENT, 0},
399 /* Read/Write macros */
400 #define prcm_read_4(reg) \
401 bus_space_read_4(am335x_prcm_sc->bst, am335x_prcm_sc->bsh, reg)
402 #define prcm_write_4(reg, val) \
403 bus_space_write_4(am335x_prcm_sc->bst, am335x_prcm_sc->bsh, reg, val)
405 void am335x_prcm_setup_dmtimer(int);
408 am335x_prcm_probe(device_t dev)
411 if (!ofw_bus_status_okay(dev))
414 if (ofw_bus_is_compatible(dev, "ti,am3-prcm")) {
415 device_set_desc(dev, "AM335x Power and Clock Management");
416 return(BUS_PROBE_DEFAULT);
423 am335x_prcm_attach(device_t dev)
425 struct am335x_prcm_softc *sc = device_get_softc(dev);
426 unsigned int sysclk, fclk;
431 if (bus_alloc_resources(dev, am335x_prcm_spec, sc->res)) {
432 device_printf(dev, "could not allocate resources\n");
436 sc->bst = rman_get_bustag(sc->res[0]);
437 sc->bsh = rman_get_bushandle(sc->res[0]);
440 ti_cpu_reset = am335x_prcm_reset;
442 if (am335x_clk_get_sysclk_freq(NULL, &sysclk) != 0)
444 if (am335x_clk_get_arm_fclk_freq(NULL, &fclk) != 0)
447 device_printf(dev, "Clocks: System %u.%01u MHz, CPU %u MHz\n",
448 sysclk/1000000, (sysclk % 1000000)/100000, fclk/1000000);
450 device_printf(dev, "can't read frequencies yet (SCM device not ready?)\n");
455 static device_method_t am335x_prcm_methods[] = {
456 DEVMETHOD(device_probe, am335x_prcm_probe),
457 DEVMETHOD(device_attach, am335x_prcm_attach),
461 static driver_t am335x_prcm_driver = {
464 sizeof(struct am335x_prcm_softc),
467 static devclass_t am335x_prcm_devclass;
469 DRIVER_MODULE(am335x_prcm, simplebus, am335x_prcm_driver,
470 am335x_prcm_devclass, 0, 0);
471 MODULE_VERSION(am335x_prcm, 1);
472 MODULE_DEPEND(am335x_prcm, ti_scm, 1, 1, 1);
474 static struct am335x_clk_details*
475 am335x_clk_details(clk_ident_t id)
477 struct am335x_clk_details *walker;
479 for (walker = g_am335x_clk_details; walker->id != INVALID_CLK_IDENT; walker++) {
480 if (id == walker->id)
488 am335x_clk_noop_activate(struct ti_clock_dev *clkdev)
495 am335x_clk_generic_activate(struct ti_clock_dev *clkdev)
497 struct am335x_prcm_softc *sc = am335x_prcm_sc;
498 struct am335x_clk_details* clk_details;
503 clk_details = am335x_clk_details(clkdev->id);
505 if (clk_details == NULL)
508 /* set *_CLKCTRL register MODULEMODE[1:0] to enable(2) */
509 prcm_write_4(clk_details->clkctrl_reg, 2);
510 while ((prcm_read_4(clk_details->clkctrl_reg) & 0x3) != 2)
517 am335x_clk_gpio_activate(struct ti_clock_dev *clkdev)
519 struct am335x_prcm_softc *sc = am335x_prcm_sc;
520 struct am335x_clk_details* clk_details;
525 clk_details = am335x_clk_details(clkdev->id);
527 if (clk_details == NULL)
530 /* set *_CLKCTRL register MODULEMODE[1:0] to enable(2) */
531 /* set *_CLKCTRL register OPTFCLKEN_GPIO_1_G DBCLK[18] to FCLK_EN(1) */
532 prcm_write_4(clk_details->clkctrl_reg, 2 | (1 << 18));
533 while ((prcm_read_4(clk_details->clkctrl_reg) &
534 (3 | (1 << 18) )) != (2 | (1 << 18)))
541 am335x_clk_noop_deactivate(struct ti_clock_dev *clkdev)
548 am335x_clk_generic_deactivate(struct ti_clock_dev *clkdev)
550 struct am335x_prcm_softc *sc = am335x_prcm_sc;
551 struct am335x_clk_details* clk_details;
556 clk_details = am335x_clk_details(clkdev->id);
558 if (clk_details == NULL)
561 /* set *_CLKCTRL register MODULEMODE[1:0] to disable(0) */
562 prcm_write_4(clk_details->clkctrl_reg, 0);
563 while ((prcm_read_4(clk_details->clkctrl_reg) & 0x3) != 0)
570 am335x_clk_noop_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc)
577 am335x_clk_generic_set_source(struct ti_clock_dev *clkdev, clk_src_t clksrc)
579 struct am335x_prcm_softc *sc = am335x_prcm_sc;
580 struct am335x_clk_details* clk_details;
586 clk_details = am335x_clk_details(clkdev->id);
588 if (clk_details == NULL)
593 reg = 0; /* SEL2: TCLKIN clock */
596 reg = 1; /* SEL1: CLK_M_OSC clock */
599 reg = 2; /* SEL3: CLK_32KHZ clock */
605 prcm_write_4(clk_details->clksel_reg, reg);
606 while ((prcm_read_4(clk_details->clksel_reg) & 0x3) != reg)
613 am335x_clk_hsmmc_get_source_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
620 am335x_clk_get_sysclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
622 uint32_t ctrl_status;
624 /* Read the input clock freq from the control module. */
625 if (ti_scm_reg_read_4(SCM_CTRL_STATUS, &ctrl_status))
628 switch ((ctrl_status>>22) & 0x3) {
650 #define DPLL_BYP_CLKSEL(reg) ((reg>>23) & 1)
651 #define DPLL_DIV(reg) ((reg & 0x7f)+1)
652 #define DPLL_MULT(reg) ((reg>>8) & 0x7FF)
653 #define DPLL_MAX_MUL 0x800
654 #define DPLL_MAX_DIV 0x80
657 am335x_clk_get_arm_fclk_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
662 reg = prcm_read_4(CM_WKUP_CM_CLKSEL_DPLL_MPU);
664 /*Check if we are running in bypass */
665 if (DPLL_BYP_CLKSEL(reg))
668 am335x_clk_get_sysclk_freq(NULL, &sysclk);
669 *freq = DPLL_MULT(reg) * (sysclk / DPLL_DIV(reg));
674 am335x_clk_get_arm_disp_freq(struct ti_clock_dev *clkdev, unsigned int *freq)
679 reg = prcm_read_4(CM_WKUP_CM_CLKSEL_DPLL_DISP);
681 /*Check if we are running in bypass */
682 if (DPLL_BYP_CLKSEL(reg))
685 am335x_clk_get_sysclk_freq(NULL, &sysclk);
686 *freq = DPLL_MULT(reg) * (sysclk / DPLL_DIV(reg));
691 am335x_clk_set_arm_disp_freq(struct ti_clock_dev *clkdev, unsigned int freq)
696 unsigned int delta, min_delta;
698 am335x_clk_get_sysclk_freq(NULL, &sysclk);
701 prcm_write_4(CM_WKUP_CM_CLKMODE_DPLL_DISP, 0x4);
703 /* Make sure it's in bypass mode */
704 while (!(prcm_read_4(CM_WKUP_CM_IDLEST_DPLL_DISP)
708 /* Dumb and non-optimal implementation */
710 for (i = 1; i < DPLL_MAX_MUL; i++) {
711 for (j = 1; j < DPLL_MAX_DIV; j++) {
712 delta = abs(freq - i*(sysclk/j));
713 if (delta < min_delta) {
723 prcm_write_4(CM_WKUP_CM_CLKSEL_DPLL_DISP, (mul << 8) | (div - 1));
726 prcm_write_4(CM_WKUP_CM_CLKMODE_DPLL_DISP, 0x7);
729 while ((!(prcm_read_4(CM_WKUP_CM_IDLEST_DPLL_DISP)
730 & (1 << 0))) && timeout--)
737 am335x_prcm_reset(void)
739 prcm_write_4(PRM_RSTCTRL, (1<<1));
743 am335x_clk_cpsw_activate(struct ti_clock_dev *clkdev)
745 struct am335x_prcm_softc *sc = am335x_prcm_sc;
750 /* set MODULENAME to ENABLE */
751 prcm_write_4(CM_PER_CPGMAC0_CLKCTRL, 2);
753 /* wait for IDLEST to become Func(0) */
754 while(prcm_read_4(CM_PER_CPGMAC0_CLKCTRL) & (3<<16));
756 /*set CLKTRCTRL to SW_WKUP(2) */
757 prcm_write_4(CM_PER_CPSW_CLKSTCTRL, 2);
759 /* wait for 125 MHz OCP clock to become active */
760 while((prcm_read_4(CM_PER_CPSW_CLKSTCTRL) & (1<<4)) == 0);
765 am335x_clk_musb0_activate(struct ti_clock_dev *clkdev)
767 struct am335x_prcm_softc *sc = am335x_prcm_sc;
772 /* set ST_DPLL_CLKDCOLDO(9) to CLK_GATED(1) */
773 /* set DPLL_CLKDCOLDO_GATE_CTRL(8) to CLK_ENABLE(1)*/
774 prcm_write_4(CM_WKUP_CM_CLKDCOLDO_DPLL_PER, 0x300);
776 /*set MODULEMODE to ENABLE(2) */
777 prcm_write_4(CM_PER_USB0_CLKCTRL, 2);
779 /* wait for MODULEMODE to become ENABLE(2) */
780 while ((prcm_read_4(CM_PER_USB0_CLKCTRL) & 0x3) != 2)
783 /* wait for IDLEST to become Func(0) */
784 while(prcm_read_4(CM_PER_USB0_CLKCTRL) & (3<<16))
791 am335x_clk_lcdc_activate(struct ti_clock_dev *clkdev)
793 struct am335x_prcm_softc *sc = am335x_prcm_sc;
799 * For now set frequency to 2*VGA_PIXEL_CLOCK
801 am335x_clk_set_arm_disp_freq(clkdev, 25175000*2);
803 /*set MODULEMODE to ENABLE(2) */
804 prcm_write_4(CM_PER_LCDC_CLKCTRL, 2);
806 /* wait for MODULEMODE to become ENABLE(2) */
807 while ((prcm_read_4(CM_PER_LCDC_CLKCTRL) & 0x3) != 2)
810 /* wait for IDLEST to become Func(0) */
811 while(prcm_read_4(CM_PER_LCDC_CLKCTRL) & (3<<16))
818 am335x_clk_pruss_activate(struct ti_clock_dev *clkdev)
820 struct am335x_prcm_softc *sc = am335x_prcm_sc;
825 /* Set MODULEMODE to ENABLE(2) */
826 prcm_write_4(CM_PER_PRUSS_CLKCTRL, 2);
828 /* Wait for MODULEMODE to become ENABLE(2) */
829 while ((prcm_read_4(CM_PER_PRUSS_CLKCTRL) & 0x3) != 2)
832 /* Set CLKTRCTRL to SW_WKUP(2) */
833 prcm_write_4(CM_PER_PRUSS_CLKSTCTRL, 2);
835 /* Wait for the 200 MHz OCP clock to become active */
836 while ((prcm_read_4(CM_PER_PRUSS_CLKSTCTRL) & (1<<4)) == 0)
839 /* Wait for the 200 MHz IEP clock to become active */
840 while ((prcm_read_4(CM_PER_PRUSS_CLKSTCTRL) & (1<<5)) == 0)
843 /* Wait for the 192 MHz UART clock to become active */
844 while ((prcm_read_4(CM_PER_PRUSS_CLKSTCTRL) & (1<<6)) == 0)
847 /* Select L3F as OCP clock */
848 prcm_write_4(CLKSEL_PRUSS_OCP_CLK, 0);
849 while ((prcm_read_4(CLKSEL_PRUSS_OCP_CLK) & 0x3) != 0)
852 /* Clear the RESET bit */
853 prcm_write_4(PRM_PER_RSTCTRL, prcm_read_4(PRM_PER_RSTCTRL) & ~2);