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15#include <linux/io.h>
16#include <linux/clk.h>
17#include <linux/clk-provider.h>
18#include <linux/clkdev.h>
19#include <linux/of.h>
20#include <mach/smemc.h>
21#include <mach/pxa3xx-regs.h>
22
23#include <dt-bindings/clock/pxa-clock.h>
24#include "clk-pxa.h"
25
26#define KHz 1000
27#define MHz (1000 * 1000)
28
29enum {
30 PXA_CORE_60Mhz = 0,
31 PXA_CORE_RUN,
32 PXA_CORE_TURBO,
33};
34
35enum {
36 PXA_BUS_60Mhz = 0,
37 PXA_BUS_HSS,
38};
39
40
41static unsigned char hss_mult[4] = { 8, 12, 16, 24 };
42
43
44static unsigned int smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, };
45static unsigned int df_clkdiv[4] = { 1, 2, 4, 1 };
46
47static const char * const get_freq_khz[] = {
48 "core", "ring_osc_60mhz", "run", "cpll", "system_bus"
49};
50
51
52
53
54
55
56unsigned int pxa3xx_get_clk_frequency_khz(int info)
57{
58 struct clk *clk;
59 unsigned long clks[5];
60 int i;
61
62 for (i = 0; i < 5; i++) {
63 clk = clk_get(NULL, get_freq_khz[i]);
64 if (IS_ERR(clk)) {
65 clks[i] = 0;
66 } else {
67 clks[i] = clk_get_rate(clk);
68 clk_put(clk);
69 }
70 }
71 if (info) {
72 pr_info("RO Mode clock: %ld.%02ldMHz\n",
73 clks[1] / 1000000, (clks[0] % 1000000) / 10000);
74 pr_info("Run Mode clock: %ld.%02ldMHz\n",
75 clks[2] / 1000000, (clks[1] % 1000000) / 10000);
76 pr_info("Turbo Mode clock: %ld.%02ldMHz\n",
77 clks[3] / 1000000, (clks[2] % 1000000) / 10000);
78 pr_info("System bus clock: %ld.%02ldMHz\n",
79 clks[4] / 1000000, (clks[4] % 1000000) / 10000);
80 }
81 return (unsigned int)clks[0] / KHz;
82}
83
84static unsigned long clk_pxa3xx_ac97_get_rate(struct clk_hw *hw,
85 unsigned long parent_rate)
86{
87 unsigned long ac97_div, rate;
88
89 ac97_div = AC97_DIV;
90
91
92
93
94 rate = parent_rate / 2;
95 rate /= ((ac97_div >> 12) & 0x7fff);
96 rate *= (ac97_div & 0xfff);
97
98 return rate;
99}
100PARENTS(clk_pxa3xx_ac97) = { "spll_624mhz" };
101RATE_RO_OPS(clk_pxa3xx_ac97, "ac97");
102
103static unsigned long clk_pxa3xx_smemc_get_rate(struct clk_hw *hw,
104 unsigned long parent_rate)
105{
106 unsigned long acsr = ACSR;
107 unsigned long memclkcfg = __raw_readl(MEMCLKCFG);
108
109 return (parent_rate / 48) * smcfs_mult[(acsr >> 23) & 0x7] /
110 df_clkdiv[(memclkcfg >> 16) & 0x3];
111}
112PARENTS(clk_pxa3xx_smemc) = { "spll_624mhz" };
113RATE_RO_OPS(clk_pxa3xx_smemc, "smemc");
114
115static bool pxa3xx_is_ring_osc_forced(void)
116{
117 unsigned long acsr = ACSR;
118
119 return acsr & ACCR_D0CS;
120}
121
122PARENTS(pxa3xx_pbus) = { "ring_osc_60mhz", "spll_624mhz" };
123PARENTS(pxa3xx_32Khz_bus) = { "osc_32_768khz", "osc_32_768khz" };
124PARENTS(pxa3xx_13MHz_bus) = { "osc_13mhz", "osc_13mhz" };
125PARENTS(pxa3xx_ac97_bus) = { "ring_osc_60mhz", "ac97" };
126PARENTS(pxa3xx_sbus) = { "ring_osc_60mhz", "system_bus" };
127PARENTS(pxa3xx_smemcbus) = { "ring_osc_60mhz", "smemc" };
128
129#define CKEN_AB(bit) ((CKEN_ ## bit > 31) ? &CKENB : &CKENA)
130#define PXA3XX_CKEN(dev_id, con_id, parents, mult_lp, div_lp, mult_hp, \
131 div_hp, bit, is_lp, flags) \
132 PXA_CKEN(dev_id, con_id, bit, parents, mult_lp, div_lp, \
133 mult_hp, div_hp, is_lp, CKEN_AB(bit), \
134 (CKEN_ ## bit % 32), flags)
135#define PXA3XX_PBUS_CKEN(dev_id, con_id, bit, mult_lp, div_lp, \
136 mult_hp, div_hp, delay) \
137 PXA3XX_CKEN(dev_id, con_id, pxa3xx_pbus_parents, mult_lp, \
138 div_lp, mult_hp, div_hp, bit, pxa3xx_is_ring_osc_forced, 0)
139#define PXA3XX_CKEN_1RATE(dev_id, con_id, bit, parents) \
140 PXA_CKEN_1RATE(dev_id, con_id, bit, parents, \
141 CKEN_AB(bit), (CKEN_ ## bit % 32), 0)
142
143static struct desc_clk_cken pxa3xx_clocks[] __initdata = {
144 PXA3XX_PBUS_CKEN("pxa2xx-uart.0", NULL, FFUART, 1, 4, 1, 42, 1),
145 PXA3XX_PBUS_CKEN("pxa2xx-uart.1", NULL, BTUART, 1, 4, 1, 42, 1),
146 PXA3XX_PBUS_CKEN("pxa2xx-uart.2", NULL, STUART, 1, 4, 1, 42, 1),
147 PXA3XX_PBUS_CKEN("pxa2xx-i2c.0", NULL, I2C, 2, 5, 1, 19, 0),
148 PXA3XX_PBUS_CKEN("pxa27x-udc", NULL, UDC, 1, 4, 1, 13, 5),
149 PXA3XX_PBUS_CKEN("pxa27x-ohci", NULL, USBH, 1, 4, 1, 13, 0),
150 PXA3XX_PBUS_CKEN("pxa3xx-u2d", NULL, USB2, 1, 4, 1, 13, 0),
151 PXA3XX_PBUS_CKEN("pxa27x-pwm.0", NULL, PWM0, 1, 6, 1, 48, 0),
152 PXA3XX_PBUS_CKEN("pxa27x-pwm.1", NULL, PWM1, 1, 6, 1, 48, 0),
153 PXA3XX_PBUS_CKEN("pxa2xx-mci.0", NULL, MMC1, 1, 4, 1, 24, 0),
154 PXA3XX_PBUS_CKEN("pxa2xx-mci.1", NULL, MMC2, 1, 4, 1, 24, 0),
155 PXA3XX_PBUS_CKEN("pxa2xx-mci.2", NULL, MMC3, 1, 4, 1, 24, 0),
156
157 PXA3XX_CKEN_1RATE("pxa27x-keypad", NULL, KEYPAD,
158 pxa3xx_32Khz_bus_parents),
159 PXA3XX_CKEN_1RATE("pxa3xx-ssp.0", NULL, SSP1, pxa3xx_13MHz_bus_parents),
160 PXA3XX_CKEN_1RATE("pxa3xx-ssp.1", NULL, SSP2, pxa3xx_13MHz_bus_parents),
161 PXA3XX_CKEN_1RATE("pxa3xx-ssp.2", NULL, SSP3, pxa3xx_13MHz_bus_parents),
162 PXA3XX_CKEN_1RATE("pxa3xx-ssp.3", NULL, SSP4, pxa3xx_13MHz_bus_parents),
163
164 PXA3XX_CKEN(NULL, "AC97CLK", pxa3xx_ac97_bus_parents, 1, 4, 1, 1, AC97,
165 pxa3xx_is_ring_osc_forced, 0),
166 PXA3XX_CKEN(NULL, "CAMCLK", pxa3xx_sbus_parents, 1, 2, 1, 1, CAMERA,
167 pxa3xx_is_ring_osc_forced, 0),
168 PXA3XX_CKEN("pxa2xx-fb", NULL, pxa3xx_sbus_parents, 1, 1, 1, 1, LCD,
169 pxa3xx_is_ring_osc_forced, 0),
170 PXA3XX_CKEN("pxa2xx-pcmcia", NULL, pxa3xx_smemcbus_parents, 1, 4,
171 1, 1, SMC, pxa3xx_is_ring_osc_forced, CLK_IGNORE_UNUSED),
172};
173
174static struct desc_clk_cken pxa300_310_clocks[] __initdata = {
175
176 PXA3XX_PBUS_CKEN("pxa3xx-gcu", NULL, PXA300_GCU, 1, 1, 1, 1, 0),
177 PXA3XX_PBUS_CKEN("pxa3xx-nand", NULL, NAND, 1, 2, 1, 4, 0),
178 PXA3XX_CKEN_1RATE("pxa3xx-gpio", NULL, GPIO, pxa3xx_13MHz_bus_parents),
179};
180
181static struct desc_clk_cken pxa320_clocks[] __initdata = {
182 PXA3XX_PBUS_CKEN("pxa3xx-nand", NULL, NAND, 1, 2, 1, 6, 0),
183 PXA3XX_PBUS_CKEN("pxa3xx-gcu", NULL, PXA320_GCU, 1, 1, 1, 1, 0),
184 PXA3XX_CKEN_1RATE("pxa3xx-gpio", NULL, GPIO, pxa3xx_13MHz_bus_parents),
185};
186
187static struct desc_clk_cken pxa93x_clocks[] __initdata = {
188
189 PXA3XX_PBUS_CKEN("pxa3xx-gcu", NULL, PXA300_GCU, 1, 1, 1, 1, 0),
190 PXA3XX_PBUS_CKEN("pxa3xx-nand", NULL, NAND, 1, 2, 1, 4, 0),
191 PXA3XX_CKEN_1RATE("pxa93x-gpio", NULL, GPIO, pxa3xx_13MHz_bus_parents),
192};
193
194static unsigned long clk_pxa3xx_system_bus_get_rate(struct clk_hw *hw,
195 unsigned long parent_rate)
196{
197 unsigned long acsr = ACSR;
198 unsigned int hss = (acsr >> 14) & 0x3;
199
200 if (pxa3xx_is_ring_osc_forced())
201 return parent_rate;
202 return parent_rate / 48 * hss_mult[hss];
203}
204
205static u8 clk_pxa3xx_system_bus_get_parent(struct clk_hw *hw)
206{
207 if (pxa3xx_is_ring_osc_forced())
208 return PXA_BUS_60Mhz;
209 else
210 return PXA_BUS_HSS;
211}
212
213PARENTS(clk_pxa3xx_system_bus) = { "ring_osc_60mhz", "spll_624mhz" };
214MUX_RO_RATE_RO_OPS(clk_pxa3xx_system_bus, "system_bus");
215
216static unsigned long clk_pxa3xx_core_get_rate(struct clk_hw *hw,
217 unsigned long parent_rate)
218{
219 return parent_rate;
220}
221
222static u8 clk_pxa3xx_core_get_parent(struct clk_hw *hw)
223{
224 unsigned long xclkcfg;
225 unsigned int t;
226
227 if (pxa3xx_is_ring_osc_forced())
228 return PXA_CORE_60Mhz;
229
230
231 __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg));
232 t = xclkcfg & 0x1;
233
234 if (t)
235 return PXA_CORE_TURBO;
236 return PXA_CORE_RUN;
237}
238PARENTS(clk_pxa3xx_core) = { "ring_osc_60mhz", "run", "cpll" };
239MUX_RO_RATE_RO_OPS(clk_pxa3xx_core, "core");
240
241static unsigned long clk_pxa3xx_run_get_rate(struct clk_hw *hw,
242 unsigned long parent_rate)
243{
244 unsigned long acsr = ACSR;
245 unsigned int xn = (acsr & ACCR_XN_MASK) >> 8;
246 unsigned int t, xclkcfg;
247
248
249 __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg));
250 t = xclkcfg & 0x1;
251
252 return t ? (parent_rate / xn) * 2 : parent_rate;
253}
254PARENTS(clk_pxa3xx_run) = { "cpll" };
255RATE_RO_OPS(clk_pxa3xx_run, "run");
256
257static unsigned long clk_pxa3xx_cpll_get_rate(struct clk_hw *hw,
258 unsigned long parent_rate)
259{
260 unsigned long acsr = ACSR;
261 unsigned int xn = (acsr & ACCR_XN_MASK) >> 8;
262 unsigned int xl = acsr & ACCR_XL_MASK;
263 unsigned int t, xclkcfg;
264
265
266 __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg));
267 t = xclkcfg & 0x1;
268
269 pr_info("RJK: parent_rate=%lu, xl=%u, xn=%u\n", parent_rate, xl, xn);
270 return t ? parent_rate * xl * xn : parent_rate * xl;
271}
272PARENTS(clk_pxa3xx_cpll) = { "osc_13mhz" };
273RATE_RO_OPS(clk_pxa3xx_cpll, "cpll");
274
275static void __init pxa3xx_register_core(void)
276{
277 clk_register_clk_pxa3xx_cpll();
278 clk_register_clk_pxa3xx_run();
279
280 clkdev_pxa_register(CLK_CORE, "core", NULL,
281 clk_register_clk_pxa3xx_core());
282}
283
284static void __init pxa3xx_register_plls(void)
285{
286 clk_register_fixed_rate(NULL, "osc_13mhz", NULL,
287 CLK_GET_RATE_NOCACHE,
288 13 * MHz);
289 clk_register_fixed_rate(NULL, "osc_32_768khz", NULL,
290 CLK_GET_RATE_NOCACHE,
291 32768);
292 clk_register_fixed_rate(NULL, "ring_osc_120mhz", NULL,
293 CLK_GET_RATE_NOCACHE,
294 120 * MHz);
295 clk_register_fixed_rate(NULL, "clk_dummy", NULL, 0, 0);
296 clk_register_fixed_factor(NULL, "spll_624mhz", "osc_13mhz", 0, 48, 1);
297 clk_register_fixed_factor(NULL, "ring_osc_60mhz", "ring_osc_120mhz",
298 0, 1, 2);
299}
300
301#define DUMMY_CLK(_con_id, _dev_id, _parent) \
302 { .con_id = _con_id, .dev_id = _dev_id, .parent = _parent }
303struct dummy_clk {
304 const char *con_id;
305 const char *dev_id;
306 const char *parent;
307};
308static struct dummy_clk dummy_clks[] __initdata = {
309 DUMMY_CLK(NULL, "pxa93x-gpio", "osc_13mhz"),
310 DUMMY_CLK(NULL, "sa1100-rtc", "osc_32_768khz"),
311 DUMMY_CLK("UARTCLK", "pxa2xx-ir", "STUART"),
312 DUMMY_CLK(NULL, "pxa3xx-pwri2c.1", "osc_13mhz"),
313};
314
315static void __init pxa3xx_dummy_clocks_init(void)
316{
317 struct clk *clk;
318 struct dummy_clk *d;
319 const char *name;
320 int i;
321
322 for (i = 0; i < ARRAY_SIZE(dummy_clks); i++) {
323 d = &dummy_clks[i];
324 name = d->dev_id ? d->dev_id : d->con_id;
325 clk = clk_register_fixed_factor(NULL, name, d->parent, 0, 1, 1);
326 clk_register_clkdev(clk, d->con_id, d->dev_id);
327 }
328}
329
330static void __init pxa3xx_base_clocks_init(void)
331{
332 pxa3xx_register_plls();
333 pxa3xx_register_core();
334 clk_register_clk_pxa3xx_system_bus();
335 clk_register_clk_pxa3xx_ac97();
336 clk_register_clk_pxa3xx_smemc();
337 clk_register_gate(NULL, "CLK_POUT", "osc_13mhz", 0, OSCC, 11, 0, NULL);
338 clkdev_pxa_register(CLK_OSTIMER, "OSTIMER0", NULL,
339 clk_register_fixed_factor(NULL, "os-timer0",
340 "osc_13mhz", 0, 1, 4));
341}
342
343int __init pxa3xx_clocks_init(void)
344{
345 int ret;
346
347 pxa3xx_base_clocks_init();
348 pxa3xx_dummy_clocks_init();
349 ret = clk_pxa_cken_init(pxa3xx_clocks, ARRAY_SIZE(pxa3xx_clocks));
350 if (ret)
351 return ret;
352 if (cpu_is_pxa320())
353 return clk_pxa_cken_init(pxa320_clocks,
354 ARRAY_SIZE(pxa320_clocks));
355 if (cpu_is_pxa300() || cpu_is_pxa310())
356 return clk_pxa_cken_init(pxa300_310_clocks,
357 ARRAY_SIZE(pxa300_310_clocks));
358 return clk_pxa_cken_init(pxa93x_clocks, ARRAY_SIZE(pxa93x_clocks));
359}
360
361static void __init pxa3xx_dt_clocks_init(struct device_node *np)
362{
363 pxa3xx_clocks_init();
364 clk_pxa_dt_common_init(np);
365}
366CLK_OF_DECLARE(pxa_clks, "marvell,pxa300-clocks", pxa3xx_dt_clocks_init);
367
