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8#include <linux/clk-provider.h>
9#include <linux/clk/samsung.h>
10#include <linux/io.h>
11#include <linux/of.h>
12#include <linux/of_address.h>
13#include <linux/reboot.h>
14
15#include <dt-bindings/clock/s3c2443.h>
16
17#include "clk.h"
18#include "clk-pll.h"
19
20
21#define LOCKCON0 0x00
22#define LOCKCON1 0x04
23#define MPLLCON 0x10
24#define EPLLCON 0x18
25#define EPLLCON_K 0x1C
26#define CLKSRC 0x20
27#define CLKDIV0 0x24
28#define CLKDIV1 0x28
29#define CLKDIV2 0x2C
30#define HCLKCON 0x30
31#define PCLKCON 0x34
32#define SCLKCON 0x38
33#define SWRST 0x44
34
35
36enum supported_socs {
37 S3C2416,
38 S3C2443,
39 S3C2450,
40};
41
42static void __iomem *reg_base;
43
44
45
46
47
48static unsigned long s3c2443_clk_regs[] __initdata = {
49 LOCKCON0,
50 LOCKCON1,
51 MPLLCON,
52 EPLLCON,
53 EPLLCON_K,
54 CLKSRC,
55 CLKDIV0,
56 CLKDIV1,
57 CLKDIV2,
58 PCLKCON,
59 HCLKCON,
60 SCLKCON,
61};
62
63PNAME(epllref_p) = { "mpllref", "mpllref", "xti", "ext" };
64PNAME(esysclk_p) = { "epllref", "epll" };
65PNAME(mpllref_p) = { "xti", "mdivclk" };
66PNAME(msysclk_p) = { "mpllref", "mpll" };
67PNAME(armclk_p) = { "armdiv" , "hclk" };
68PNAME(i2s0_p) = { "div_i2s0", "ext_i2s", "epllref", "epllref" };
69
70static struct samsung_mux_clock s3c2443_common_muxes[] __initdata = {
71 MUX(0, "epllref", epllref_p, CLKSRC, 7, 2),
72 MUX(ESYSCLK, "esysclk", esysclk_p, CLKSRC, 6, 1),
73 MUX(0, "mpllref", mpllref_p, CLKSRC, 3, 1),
74 MUX(MSYSCLK, "msysclk", msysclk_p, CLKSRC, 4, 1),
75 MUX(ARMCLK, "armclk", armclk_p, CLKDIV0, 13, 1),
76 MUX(0, "mux_i2s0", i2s0_p, CLKSRC, 14, 2),
77};
78
79static struct clk_div_table hclk_d[] = {
80 { .val = 0, .div = 1 },
81 { .val = 1, .div = 2 },
82 { .val = 3, .div = 4 },
83 { },
84};
85
86static struct clk_div_table mdivclk_d[] = {
87 { .val = 0, .div = 1 },
88 { .val = 1, .div = 3 },
89 { .val = 2, .div = 5 },
90 { .val = 3, .div = 7 },
91 { .val = 4, .div = 9 },
92 { .val = 5, .div = 11 },
93 { .val = 6, .div = 13 },
94 { .val = 7, .div = 15 },
95 { },
96};
97
98static struct samsung_div_clock s3c2443_common_dividers[] __initdata = {
99 DIV_T(0, "mdivclk", "xti", CLKDIV0, 6, 3, mdivclk_d),
100 DIV(0, "prediv", "msysclk", CLKDIV0, 4, 2),
101 DIV_T(HCLK, "hclk", "prediv", CLKDIV0, 0, 2, hclk_d),
102 DIV(PCLK, "pclk", "hclk", CLKDIV0, 2, 1),
103 DIV(0, "div_hsspi0_epll", "esysclk", CLKDIV1, 24, 2),
104 DIV(0, "div_fimd", "esysclk", CLKDIV1, 16, 8),
105 DIV(0, "div_i2s0", "esysclk", CLKDIV1, 12, 4),
106 DIV(0, "div_uart", "esysclk", CLKDIV1, 8, 4),
107 DIV(0, "div_hsmmc1", "esysclk", CLKDIV1, 6, 2),
108 DIV(0, "div_usbhost", "esysclk", CLKDIV1, 4, 2),
109};
110
111static struct samsung_gate_clock s3c2443_common_gates[] __initdata = {
112 GATE(SCLK_HSMMC_EXT, "sclk_hsmmcext", "ext", SCLKCON, 13, 0, 0),
113 GATE(SCLK_HSMMC1, "sclk_hsmmc1", "div_hsmmc1", SCLKCON, 12, 0, 0),
114 GATE(SCLK_FIMD, "sclk_fimd", "div_fimd", SCLKCON, 10, 0, 0),
115 GATE(SCLK_I2S0, "sclk_i2s0", "mux_i2s0", SCLKCON, 9, 0, 0),
116 GATE(SCLK_UART, "sclk_uart", "div_uart", SCLKCON, 8, 0, 0),
117 GATE(SCLK_USBH, "sclk_usbhost", "div_usbhost", SCLKCON, 1, 0, 0),
118 GATE(HCLK_DRAM, "dram", "hclk", HCLKCON, 19, CLK_IGNORE_UNUSED, 0),
119 GATE(HCLK_SSMC, "ssmc", "hclk", HCLKCON, 18, CLK_IGNORE_UNUSED, 0),
120 GATE(HCLK_HSMMC1, "hsmmc1", "hclk", HCLKCON, 16, 0, 0),
121 GATE(HCLK_USBD, "usb-device", "hclk", HCLKCON, 12, 0, 0),
122 GATE(HCLK_USBH, "usb-host", "hclk", HCLKCON, 11, 0, 0),
123 GATE(HCLK_LCD, "lcd", "hclk", HCLKCON, 9, 0, 0),
124 GATE(HCLK_DMA5, "dma5", "hclk", HCLKCON, 5, CLK_IGNORE_UNUSED, 0),
125 GATE(HCLK_DMA4, "dma4", "hclk", HCLKCON, 4, CLK_IGNORE_UNUSED, 0),
126 GATE(HCLK_DMA3, "dma3", "hclk", HCLKCON, 3, CLK_IGNORE_UNUSED, 0),
127 GATE(HCLK_DMA2, "dma2", "hclk", HCLKCON, 2, CLK_IGNORE_UNUSED, 0),
128 GATE(HCLK_DMA1, "dma1", "hclk", HCLKCON, 1, CLK_IGNORE_UNUSED, 0),
129 GATE(HCLK_DMA0, "dma0", "hclk", HCLKCON, 0, CLK_IGNORE_UNUSED, 0),
130 GATE(PCLK_GPIO, "gpio", "pclk", PCLKCON, 13, CLK_IGNORE_UNUSED, 0),
131 GATE(PCLK_RTC, "rtc", "pclk", PCLKCON, 12, 0, 0),
132 GATE(PCLK_WDT, "wdt", "pclk", PCLKCON, 11, 0, 0),
133 GATE(PCLK_PWM, "pwm", "pclk", PCLKCON, 10, 0, 0),
134 GATE(PCLK_I2S0, "i2s0", "pclk", PCLKCON, 9, 0, 0),
135 GATE(PCLK_AC97, "ac97", "pclk", PCLKCON, 8, 0, 0),
136 GATE(PCLK_ADC, "adc", "pclk", PCLKCON, 7, 0, 0),
137 GATE(PCLK_SPI0, "spi0", "pclk", PCLKCON, 6, 0, 0),
138 GATE(PCLK_I2C0, "i2c0", "pclk", PCLKCON, 4, 0, 0),
139 GATE(PCLK_UART3, "uart3", "pclk", PCLKCON, 3, 0, 0),
140 GATE(PCLK_UART2, "uart2", "pclk", PCLKCON, 2, 0, 0),
141 GATE(PCLK_UART1, "uart1", "pclk", PCLKCON, 1, 0, 0),
142 GATE(PCLK_UART0, "uart0", "pclk", PCLKCON, 0, 0, 0),
143};
144
145static struct samsung_clock_alias s3c2443_common_aliases[] __initdata = {
146 ALIAS(MSYSCLK, NULL, "msysclk"),
147 ALIAS(ARMCLK, NULL, "armclk"),
148 ALIAS(MPLL, NULL, "mpll"),
149 ALIAS(EPLL, NULL, "epll"),
150 ALIAS(HCLK, NULL, "hclk"),
151 ALIAS(HCLK_SSMC, NULL, "nand"),
152 ALIAS(PCLK_UART0, "s3c2440-uart.0", "uart"),
153 ALIAS(PCLK_UART1, "s3c2440-uart.1", "uart"),
154 ALIAS(PCLK_UART2, "s3c2440-uart.2", "uart"),
155 ALIAS(PCLK_UART3, "s3c2440-uart.3", "uart"),
156 ALIAS(PCLK_UART0, "s3c2440-uart.0", "clk_uart_baud2"),
157 ALIAS(PCLK_UART1, "s3c2440-uart.1", "clk_uart_baud2"),
158 ALIAS(PCLK_UART2, "s3c2440-uart.2", "clk_uart_baud2"),
159 ALIAS(PCLK_UART3, "s3c2440-uart.3", "clk_uart_baud2"),
160 ALIAS(SCLK_UART, NULL, "clk_uart_baud3"),
161 ALIAS(PCLK_PWM, NULL, "timers"),
162 ALIAS(PCLK_RTC, NULL, "rtc"),
163 ALIAS(PCLK_WDT, NULL, "watchdog"),
164 ALIAS(PCLK_ADC, NULL, "adc"),
165 ALIAS(PCLK_I2C0, "s3c2410-i2c.0", "i2c"),
166 ALIAS(HCLK_USBD, NULL, "usb-device"),
167 ALIAS(HCLK_USBH, NULL, "usb-host"),
168 ALIAS(SCLK_USBH, NULL, "usb-bus-host"),
169 ALIAS(PCLK_SPI0, "s3c2443-spi.0", "spi"),
170 ALIAS(PCLK_SPI0, "s3c2443-spi.0", "spi_busclk0"),
171 ALIAS(HCLK_HSMMC1, "s3c-sdhci.1", "hsmmc"),
172 ALIAS(HCLK_HSMMC1, "s3c-sdhci.1", "mmc_busclk.0"),
173 ALIAS(PCLK_I2S0, "samsung-i2s.0", "iis"),
174 ALIAS(SCLK_I2S0, NULL, "i2s-if"),
175 ALIAS(HCLK_LCD, NULL, "lcd"),
176 ALIAS(SCLK_FIMD, NULL, "sclk_fimd"),
177};
178
179
180
181static struct samsung_pll_clock s3c2416_pll_clks[] __initdata = {
182 PLL(pll_6552_s3c2416, MPLL, "mpll", "mpllref", LOCKCON0, MPLLCON, NULL),
183 PLL(pll_6553, EPLL, "epll", "epllref", LOCKCON1, EPLLCON, NULL),
184};
185
186PNAME(s3c2416_hsmmc0_p) = { "sclk_hsmmc0", "sclk_hsmmcext" };
187PNAME(s3c2416_hsmmc1_p) = { "sclk_hsmmc1", "sclk_hsmmcext" };
188PNAME(s3c2416_hsspi0_p) = { "hsspi0_epll", "hsspi0_mpll" };
189
190static struct clk_div_table armdiv_s3c2416_d[] = {
191 { .val = 0, .div = 1 },
192 { .val = 1, .div = 2 },
193 { .val = 2, .div = 3 },
194 { .val = 3, .div = 4 },
195 { .val = 5, .div = 6 },
196 { .val = 7, .div = 8 },
197 { },
198};
199
200static struct samsung_div_clock s3c2416_dividers[] __initdata = {
201 DIV_T(ARMDIV, "armdiv", "msysclk", CLKDIV0, 9, 3, armdiv_s3c2416_d),
202 DIV(0, "div_hsspi0_mpll", "msysclk", CLKDIV2, 0, 4),
203 DIV(0, "div_hsmmc0", "esysclk", CLKDIV2, 6, 2),
204};
205
206static struct samsung_mux_clock s3c2416_muxes[] __initdata = {
207 MUX(MUX_HSMMC0, "mux_hsmmc0", s3c2416_hsmmc0_p, CLKSRC, 16, 1),
208 MUX(MUX_HSMMC1, "mux_hsmmc1", s3c2416_hsmmc1_p, CLKSRC, 17, 1),
209 MUX(MUX_HSSPI0, "mux_hsspi0", s3c2416_hsspi0_p, CLKSRC, 18, 1),
210};
211
212static struct samsung_gate_clock s3c2416_gates[] __initdata = {
213 GATE(0, "hsspi0_mpll", "div_hsspi0_mpll", SCLKCON, 19, 0, 0),
214 GATE(0, "hsspi0_epll", "div_hsspi0_epll", SCLKCON, 14, 0, 0),
215 GATE(0, "sclk_hsmmc0", "div_hsmmc0", SCLKCON, 6, 0, 0),
216 GATE(HCLK_2D, "2d", "hclk", HCLKCON, 20, 0, 0),
217 GATE(HCLK_HSMMC0, "hsmmc0", "hclk", HCLKCON, 15, 0, 0),
218 GATE(HCLK_IROM, "irom", "hclk", HCLKCON, 13, CLK_IGNORE_UNUSED, 0),
219 GATE(PCLK_PCM, "pcm", "pclk", PCLKCON, 19, 0, 0),
220};
221
222static struct samsung_clock_alias s3c2416_aliases[] __initdata = {
223 ALIAS(HCLK_HSMMC0, "s3c-sdhci.0", "hsmmc"),
224 ALIAS(HCLK_HSMMC0, "s3c-sdhci.0", "mmc_busclk.0"),
225 ALIAS(MUX_HSMMC0, "s3c-sdhci.0", "mmc_busclk.2"),
226 ALIAS(MUX_HSMMC1, "s3c-sdhci.1", "mmc_busclk.2"),
227 ALIAS(MUX_HSSPI0, "s3c2443-spi.0", "spi_busclk2"),
228 ALIAS(ARMDIV, NULL, "armdiv"),
229};
230
231
232
233static struct samsung_pll_clock s3c2443_pll_clks[] __initdata = {
234 PLL(pll_3000, MPLL, "mpll", "mpllref", LOCKCON0, MPLLCON, NULL),
235 PLL(pll_2126, EPLL, "epll", "epllref", LOCKCON1, EPLLCON, NULL),
236};
237
238static struct clk_div_table armdiv_s3c2443_d[] = {
239 { .val = 0, .div = 1 },
240 { .val = 8, .div = 2 },
241 { .val = 2, .div = 3 },
242 { .val = 9, .div = 4 },
243 { .val = 10, .div = 6 },
244 { .val = 11, .div = 8 },
245 { .val = 13, .div = 12 },
246 { .val = 15, .div = 16 },
247 { },
248};
249
250static struct samsung_div_clock s3c2443_dividers[] __initdata = {
251 DIV_T(ARMDIV, "armdiv", "msysclk", CLKDIV0, 9, 4, armdiv_s3c2443_d),
252 DIV(0, "div_cam", "esysclk", CLKDIV1, 26, 4),
253};
254
255static struct samsung_gate_clock s3c2443_gates[] __initdata = {
256 GATE(SCLK_HSSPI0, "sclk_hsspi0", "div_hsspi0_epll", SCLKCON, 14, 0, 0),
257 GATE(SCLK_CAM, "sclk_cam", "div_cam", SCLKCON, 11, 0, 0),
258 GATE(HCLK_CFC, "cfc", "hclk", HCLKCON, 17, CLK_IGNORE_UNUSED, 0),
259 GATE(HCLK_CAM, "cam", "hclk", HCLKCON, 8, 0, 0),
260 GATE(PCLK_SPI1, "spi1", "pclk", PCLKCON, 15, 0, 0),
261 GATE(PCLK_SDI, "sdi", "pclk", PCLKCON, 5, 0, 0),
262};
263
264static struct samsung_clock_alias s3c2443_aliases[] __initdata = {
265 ALIAS(SCLK_HSSPI0, "s3c2443-spi.0", "spi_busclk2"),
266 ALIAS(SCLK_HSMMC1, "s3c-sdhci.1", "mmc_busclk.2"),
267 ALIAS(SCLK_CAM, NULL, "camif-upll"),
268 ALIAS(PCLK_SPI1, "s3c2410-spi.0", "spi"),
269 ALIAS(PCLK_SDI, NULL, "sdi"),
270 ALIAS(HCLK_CFC, NULL, "cfc"),
271 ALIAS(ARMDIV, NULL, "armdiv"),
272};
273
274
275
276PNAME(s3c2450_cam_p) = { "div_cam", "hclk" };
277PNAME(s3c2450_hsspi1_p) = { "hsspi1_epll", "hsspi1_mpll" };
278PNAME(i2s1_p) = { "div_i2s1", "ext_i2s", "epllref", "epllref" };
279
280static struct samsung_div_clock s3c2450_dividers[] __initdata = {
281 DIV(0, "div_cam", "esysclk", CLKDIV1, 26, 4),
282 DIV(0, "div_hsspi1_epll", "esysclk", CLKDIV2, 24, 2),
283 DIV(0, "div_hsspi1_mpll", "msysclk", CLKDIV2, 16, 4),
284 DIV(0, "div_i2s1", "esysclk", CLKDIV2, 12, 4),
285};
286
287static struct samsung_mux_clock s3c2450_muxes[] __initdata = {
288 MUX(0, "mux_cam", s3c2450_cam_p, CLKSRC, 20, 1),
289 MUX(MUX_HSSPI1, "mux_hsspi1", s3c2450_hsspi1_p, CLKSRC, 19, 1),
290 MUX(0, "mux_i2s1", i2s1_p, CLKSRC, 12, 2),
291};
292
293static struct samsung_gate_clock s3c2450_gates[] __initdata = {
294 GATE(SCLK_I2S1, "sclk_i2s1", "div_i2s1", SCLKCON, 5, 0, 0),
295 GATE(HCLK_CFC, "cfc", "hclk", HCLKCON, 17, 0, 0),
296 GATE(HCLK_CAM, "cam", "hclk", HCLKCON, 8, 0, 0),
297 GATE(HCLK_DMA7, "dma7", "hclk", HCLKCON, 7, CLK_IGNORE_UNUSED, 0),
298 GATE(HCLK_DMA6, "dma6", "hclk", HCLKCON, 6, CLK_IGNORE_UNUSED, 0),
299 GATE(PCLK_I2S1, "i2s1", "pclk", PCLKCON, 17, 0, 0),
300 GATE(PCLK_I2C1, "i2c1", "pclk", PCLKCON, 16, 0, 0),
301 GATE(PCLK_SPI1, "spi1", "pclk", PCLKCON, 14, 0, 0),
302};
303
304static struct samsung_clock_alias s3c2450_aliases[] __initdata = {
305 ALIAS(PCLK_SPI1, "s3c2443-spi.1", "spi"),
306 ALIAS(PCLK_SPI1, "s3c2443-spi.1", "spi_busclk0"),
307 ALIAS(MUX_HSSPI1, "s3c2443-spi.1", "spi_busclk2"),
308 ALIAS(PCLK_I2C1, "s3c2410-i2c.1", "i2c"),
309};
310
311static int s3c2443_restart(struct notifier_block *this,
312 unsigned long mode, void *cmd)
313{
314 __raw_writel(0x533c2443, reg_base + SWRST);
315 return NOTIFY_DONE;
316}
317
318static struct notifier_block s3c2443_restart_handler = {
319 .notifier_call = s3c2443_restart,
320 .priority = 129,
321};
322
323
324
325
326
327static struct samsung_fixed_rate_clock s3c2443_common_frate_clks[] __initdata = {
328 FRATE(0, "xti", NULL, 0, 0),
329 FRATE(0, "ext", NULL, 0, 0),
330 FRATE(0, "ext_i2s", NULL, 0, 0),
331 FRATE(0, "ext_uart", NULL, 0, 0),
332};
333
334static void __init s3c2443_common_clk_register_fixed_ext(
335 struct samsung_clk_provider *ctx, unsigned long xti_f)
336{
337 s3c2443_common_frate_clks[0].fixed_rate = xti_f;
338 samsung_clk_register_fixed_rate(ctx, s3c2443_common_frate_clks,
339 ARRAY_SIZE(s3c2443_common_frate_clks));
340}
341
342void __init s3c2443_common_clk_init(struct device_node *np, unsigned long xti_f,
343 int current_soc,
344 void __iomem *base)
345{
346 struct samsung_clk_provider *ctx;
347 int ret;
348 reg_base = base;
349
350 if (np) {
351 reg_base = of_iomap(np, 0);
352 if (!reg_base)
353 panic("%s: failed to map registers\n", __func__);
354 }
355
356 ctx = samsung_clk_init(np, reg_base, NR_CLKS);
357
358
359 if (!np)
360 s3c2443_common_clk_register_fixed_ext(ctx, xti_f);
361
362
363 if (current_soc == S3C2416 || current_soc == S3C2450)
364 samsung_clk_register_pll(ctx, s3c2416_pll_clks,
365 ARRAY_SIZE(s3c2416_pll_clks), reg_base);
366 else
367 samsung_clk_register_pll(ctx, s3c2443_pll_clks,
368 ARRAY_SIZE(s3c2443_pll_clks), reg_base);
369
370
371 samsung_clk_register_mux(ctx, s3c2443_common_muxes,
372 ARRAY_SIZE(s3c2443_common_muxes));
373 samsung_clk_register_div(ctx, s3c2443_common_dividers,
374 ARRAY_SIZE(s3c2443_common_dividers));
375 samsung_clk_register_gate(ctx, s3c2443_common_gates,
376 ARRAY_SIZE(s3c2443_common_gates));
377 samsung_clk_register_alias(ctx, s3c2443_common_aliases,
378 ARRAY_SIZE(s3c2443_common_aliases));
379
380
381 switch (current_soc) {
382 case S3C2450:
383 samsung_clk_register_div(ctx, s3c2450_dividers,
384 ARRAY_SIZE(s3c2450_dividers));
385 samsung_clk_register_mux(ctx, s3c2450_muxes,
386 ARRAY_SIZE(s3c2450_muxes));
387 samsung_clk_register_gate(ctx, s3c2450_gates,
388 ARRAY_SIZE(s3c2450_gates));
389 samsung_clk_register_alias(ctx, s3c2450_aliases,
390 ARRAY_SIZE(s3c2450_aliases));
391 fallthrough;
392 case S3C2416:
393 samsung_clk_register_div(ctx, s3c2416_dividers,
394 ARRAY_SIZE(s3c2416_dividers));
395 samsung_clk_register_mux(ctx, s3c2416_muxes,
396 ARRAY_SIZE(s3c2416_muxes));
397 samsung_clk_register_gate(ctx, s3c2416_gates,
398 ARRAY_SIZE(s3c2416_gates));
399 samsung_clk_register_alias(ctx, s3c2416_aliases,
400 ARRAY_SIZE(s3c2416_aliases));
401 break;
402 case S3C2443:
403 samsung_clk_register_div(ctx, s3c2443_dividers,
404 ARRAY_SIZE(s3c2443_dividers));
405 samsung_clk_register_gate(ctx, s3c2443_gates,
406 ARRAY_SIZE(s3c2443_gates));
407 samsung_clk_register_alias(ctx, s3c2443_aliases,
408 ARRAY_SIZE(s3c2443_aliases));
409 break;
410 }
411
412 samsung_clk_sleep_init(reg_base, s3c2443_clk_regs,
413 ARRAY_SIZE(s3c2443_clk_regs));
414
415 samsung_clk_of_add_provider(np, ctx);
416
417 ret = register_restart_handler(&s3c2443_restart_handler);
418 if (ret)
419 pr_warn("cannot register restart handler, %d\n", ret);
420}
421
422static void __init s3c2416_clk_init(struct device_node *np)
423{
424 s3c2443_common_clk_init(np, 0, S3C2416, NULL);
425}
426CLK_OF_DECLARE(s3c2416_clk, "samsung,s3c2416-clock", s3c2416_clk_init);
427
428static void __init s3c2443_clk_init(struct device_node *np)
429{
430 s3c2443_common_clk_init(np, 0, S3C2443, NULL);
431}
432CLK_OF_DECLARE(s3c2443_clk, "samsung,s3c2443-clock", s3c2443_clk_init);
433
434static void __init s3c2450_clk_init(struct device_node *np)
435{
436 s3c2443_common_clk_init(np, 0, S3C2450, NULL);
437}
438CLK_OF_DECLARE(s3c2450_clk, "samsung,s3c2450-clock", s3c2450_clk_init);
439
