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1 | /* |
2 | * Copyright (c) 2014 Oleksij Rempel <linux@rempel-privat.de>. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | */ | |
16 | ||
17 | #include <linux/clk.h> | |
18 | #include <linux/clkdev.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/io.h> | |
21 | #include <linux/clk-provider.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/of.h> | |
24 | #include <linux/of_address.h> | |
25 | #include <dt-bindings/clock/alphascale,asm9260.h> | |
26 | ||
27 | #define HW_AHBCLKCTRL0 0x0020 | |
28 | #define HW_AHBCLKCTRL1 0x0030 | |
29 | #define HW_SYSPLLCTRL 0x0100 | |
30 | #define HW_MAINCLKSEL 0x0120 | |
31 | #define HW_MAINCLKUEN 0x0124 | |
32 | #define HW_UARTCLKSEL 0x0128 | |
33 | #define HW_UARTCLKUEN 0x012c | |
34 | #define HW_I2S0CLKSEL 0x0130 | |
35 | #define HW_I2S0CLKUEN 0x0134 | |
36 | #define HW_I2S1CLKSEL 0x0138 | |
37 | #define HW_I2S1CLKUEN 0x013c | |
38 | #define HW_WDTCLKSEL 0x0160 | |
39 | #define HW_WDTCLKUEN 0x0164 | |
40 | #define HW_CLKOUTCLKSEL 0x0170 | |
41 | #define HW_CLKOUTCLKUEN 0x0174 | |
42 | #define HW_CPUCLKDIV 0x017c | |
43 | #define HW_SYSAHBCLKDIV 0x0180 | |
44 | #define HW_I2S0MCLKDIV 0x0190 | |
45 | #define HW_I2S0SCLKDIV 0x0194 | |
46 | #define HW_I2S1MCLKDIV 0x0188 | |
47 | #define HW_I2S1SCLKDIV 0x018c | |
48 | #define HW_UART0CLKDIV 0x0198 | |
49 | #define HW_UART1CLKDIV 0x019c | |
50 | #define HW_UART2CLKDIV 0x01a0 | |
51 | #define HW_UART3CLKDIV 0x01a4 | |
52 | #define HW_UART4CLKDIV 0x01a8 | |
53 | #define HW_UART5CLKDIV 0x01ac | |
54 | #define HW_UART6CLKDIV 0x01b0 | |
55 | #define HW_UART7CLKDIV 0x01b4 | |
56 | #define HW_UART8CLKDIV 0x01b8 | |
57 | #define HW_UART9CLKDIV 0x01bc | |
58 | #define HW_SPI0CLKDIV 0x01c0 | |
59 | #define HW_SPI1CLKDIV 0x01c4 | |
60 | #define HW_QUADSPICLKDIV 0x01c8 | |
61 | #define HW_SSP0CLKDIV 0x01d0 | |
62 | #define HW_NANDCLKDIV 0x01d4 | |
63 | #define HW_TRACECLKDIV 0x01e0 | |
64 | #define HW_CAMMCLKDIV 0x01e8 | |
65 | #define HW_WDTCLKDIV 0x01ec | |
66 | #define HW_CLKOUTCLKDIV 0x01f4 | |
67 | #define HW_MACCLKDIV 0x01f8 | |
68 | #define HW_LCDCLKDIV 0x01fc | |
69 | #define HW_ADCANACLKDIV 0x0200 | |
70 | ||
71 | static struct clk *clks[MAX_CLKS]; | |
72 | static struct clk_onecell_data clk_data; | |
73 | static DEFINE_SPINLOCK(asm9260_clk_lock); | |
74 | ||
75 | struct asm9260_div_clk { | |
76 | unsigned int idx; | |
77 | const char *name; | |
78 | const char *parent_name; | |
79 | u32 reg; | |
80 | }; | |
81 | ||
82 | struct asm9260_gate_data { | |
83 | unsigned int idx; | |
84 | const char *name; | |
85 | const char *parent_name; | |
86 | u32 reg; | |
87 | u8 bit_idx; | |
88 | unsigned long flags; | |
89 | }; | |
90 | ||
91 | struct asm9260_mux_clock { | |
92 | u8 mask; | |
93 | u32 *table; | |
94 | const char *name; | |
95 | const char **parent_names; | |
96 | u8 num_parents; | |
97 | unsigned long offset; | |
98 | unsigned long flags; | |
99 | }; | |
100 | ||
101 | static void __iomem *base; | |
102 | ||
103 | static const struct asm9260_div_clk asm9260_div_clks[] __initconst = { | |
104 | { CLKID_SYS_CPU, "cpu_div", "main_gate", HW_CPUCLKDIV }, | |
105 | { CLKID_SYS_AHB, "ahb_div", "cpu_div", HW_SYSAHBCLKDIV }, | |
106 | ||
107 | /* i2s has two deviders: one for only external mclk and internal | |
108 | * devider for all clks. */ | |
109 | { CLKID_SYS_I2S0M, "i2s0m_div", "i2s0_mclk", HW_I2S0MCLKDIV }, | |
110 | { CLKID_SYS_I2S1M, "i2s1m_div", "i2s1_mclk", HW_I2S1MCLKDIV }, | |
111 | { CLKID_SYS_I2S0S, "i2s0s_div", "i2s0_gate", HW_I2S0SCLKDIV }, | |
112 | { CLKID_SYS_I2S1S, "i2s1s_div", "i2s0_gate", HW_I2S1SCLKDIV }, | |
113 | ||
114 | { CLKID_SYS_UART0, "uart0_div", "uart_gate", HW_UART0CLKDIV }, | |
115 | { CLKID_SYS_UART1, "uart1_div", "uart_gate", HW_UART1CLKDIV }, | |
116 | { CLKID_SYS_UART2, "uart2_div", "uart_gate", HW_UART2CLKDIV }, | |
117 | { CLKID_SYS_UART3, "uart3_div", "uart_gate", HW_UART3CLKDIV }, | |
118 | { CLKID_SYS_UART4, "uart4_div", "uart_gate", HW_UART4CLKDIV }, | |
119 | { CLKID_SYS_UART5, "uart5_div", "uart_gate", HW_UART5CLKDIV }, | |
120 | { CLKID_SYS_UART6, "uart6_div", "uart_gate", HW_UART6CLKDIV }, | |
121 | { CLKID_SYS_UART7, "uart7_div", "uart_gate", HW_UART7CLKDIV }, | |
122 | { CLKID_SYS_UART8, "uart8_div", "uart_gate", HW_UART8CLKDIV }, | |
123 | { CLKID_SYS_UART9, "uart9_div", "uart_gate", HW_UART9CLKDIV }, | |
124 | ||
125 | { CLKID_SYS_SPI0, "spi0_div", "main_gate", HW_SPI0CLKDIV }, | |
126 | { CLKID_SYS_SPI1, "spi1_div", "main_gate", HW_SPI1CLKDIV }, | |
127 | { CLKID_SYS_QUADSPI, "quadspi_div", "main_gate", HW_QUADSPICLKDIV }, | |
128 | { CLKID_SYS_SSP0, "ssp0_div", "main_gate", HW_SSP0CLKDIV }, | |
129 | { CLKID_SYS_NAND, "nand_div", "main_gate", HW_NANDCLKDIV }, | |
130 | { CLKID_SYS_TRACE, "trace_div", "main_gate", HW_TRACECLKDIV }, | |
131 | { CLKID_SYS_CAMM, "camm_div", "main_gate", HW_CAMMCLKDIV }, | |
132 | { CLKID_SYS_MAC, "mac_div", "main_gate", HW_MACCLKDIV }, | |
133 | { CLKID_SYS_LCD, "lcd_div", "main_gate", HW_LCDCLKDIV }, | |
134 | { CLKID_SYS_ADCANA, "adcana_div", "main_gate", HW_ADCANACLKDIV }, | |
135 | ||
136 | { CLKID_SYS_WDT, "wdt_div", "wdt_gate", HW_WDTCLKDIV }, | |
137 | { CLKID_SYS_CLKOUT, "clkout_div", "clkout_gate", HW_CLKOUTCLKDIV }, | |
138 | }; | |
139 | ||
140 | static const struct asm9260_gate_data asm9260_mux_gates[] __initconst = { | |
141 | { 0, "main_gate", "main_mux", HW_MAINCLKUEN, 0 }, | |
142 | { 0, "uart_gate", "uart_mux", HW_UARTCLKUEN, 0 }, | |
143 | { 0, "i2s0_gate", "i2s0_mux", HW_I2S0CLKUEN, 0 }, | |
144 | { 0, "i2s1_gate", "i2s1_mux", HW_I2S1CLKUEN, 0 }, | |
145 | { 0, "wdt_gate", "wdt_mux", HW_WDTCLKUEN, 0 }, | |
146 | { 0, "clkout_gate", "clkout_mux", HW_CLKOUTCLKUEN, 0 }, | |
147 | }; | |
148 | static const struct asm9260_gate_data asm9260_ahb_gates[] __initconst = { | |
149 | /* ahb gates */ | |
150 | { CLKID_AHB_ROM, "rom", "ahb_div", | |
151 | HW_AHBCLKCTRL0, 1, CLK_IGNORE_UNUSED}, | |
152 | { CLKID_AHB_RAM, "ram", "ahb_div", | |
153 | HW_AHBCLKCTRL0, 2, CLK_IGNORE_UNUSED}, | |
154 | { CLKID_AHB_GPIO, "gpio", "ahb_div", | |
155 | HW_AHBCLKCTRL0, 4 }, | |
156 | { CLKID_AHB_MAC, "mac", "ahb_div", | |
157 | HW_AHBCLKCTRL0, 5 }, | |
158 | { CLKID_AHB_EMI, "emi", "ahb_div", | |
159 | HW_AHBCLKCTRL0, 6, CLK_IGNORE_UNUSED}, | |
160 | { CLKID_AHB_USB0, "usb0", "ahb_div", | |
161 | HW_AHBCLKCTRL0, 7 }, | |
162 | { CLKID_AHB_USB1, "usb1", "ahb_div", | |
163 | HW_AHBCLKCTRL0, 8 }, | |
164 | { CLKID_AHB_DMA0, "dma0", "ahb_div", | |
165 | HW_AHBCLKCTRL0, 9 }, | |
166 | { CLKID_AHB_DMA1, "dma1", "ahb_div", | |
167 | HW_AHBCLKCTRL0, 10 }, | |
168 | { CLKID_AHB_UART0, "uart0", "ahb_div", | |
169 | HW_AHBCLKCTRL0, 11 }, | |
170 | { CLKID_AHB_UART1, "uart1", "ahb_div", | |
171 | HW_AHBCLKCTRL0, 12 }, | |
172 | { CLKID_AHB_UART2, "uart2", "ahb_div", | |
173 | HW_AHBCLKCTRL0, 13 }, | |
174 | { CLKID_AHB_UART3, "uart3", "ahb_div", | |
175 | HW_AHBCLKCTRL0, 14 }, | |
176 | { CLKID_AHB_UART4, "uart4", "ahb_div", | |
177 | HW_AHBCLKCTRL0, 15 }, | |
178 | { CLKID_AHB_UART5, "uart5", "ahb_div", | |
179 | HW_AHBCLKCTRL0, 16 }, | |
180 | { CLKID_AHB_UART6, "uart6", "ahb_div", | |
181 | HW_AHBCLKCTRL0, 17 }, | |
182 | { CLKID_AHB_UART7, "uart7", "ahb_div", | |
183 | HW_AHBCLKCTRL0, 18 }, | |
184 | { CLKID_AHB_UART8, "uart8", "ahb_div", | |
185 | HW_AHBCLKCTRL0, 19 }, | |
186 | { CLKID_AHB_UART9, "uart9", "ahb_div", | |
187 | HW_AHBCLKCTRL0, 20 }, | |
188 | { CLKID_AHB_I2S0, "i2s0", "ahb_div", | |
189 | HW_AHBCLKCTRL0, 21 }, | |
190 | { CLKID_AHB_I2C0, "i2c0", "ahb_div", | |
191 | HW_AHBCLKCTRL0, 22 }, | |
192 | { CLKID_AHB_I2C1, "i2c1", "ahb_div", | |
193 | HW_AHBCLKCTRL0, 23 }, | |
194 | { CLKID_AHB_SSP0, "ssp0", "ahb_div", | |
195 | HW_AHBCLKCTRL0, 24 }, | |
196 | { CLKID_AHB_IOCONFIG, "ioconf", "ahb_div", | |
197 | HW_AHBCLKCTRL0, 25 }, | |
198 | { CLKID_AHB_WDT, "wdt", "ahb_div", | |
199 | HW_AHBCLKCTRL0, 26 }, | |
200 | { CLKID_AHB_CAN0, "can0", "ahb_div", | |
201 | HW_AHBCLKCTRL0, 27 }, | |
202 | { CLKID_AHB_CAN1, "can1", "ahb_div", | |
203 | HW_AHBCLKCTRL0, 28 }, | |
204 | { CLKID_AHB_MPWM, "mpwm", "ahb_div", | |
205 | HW_AHBCLKCTRL0, 29 }, | |
206 | { CLKID_AHB_SPI0, "spi0", "ahb_div", | |
207 | HW_AHBCLKCTRL0, 30 }, | |
208 | { CLKID_AHB_SPI1, "spi1", "ahb_div", | |
209 | HW_AHBCLKCTRL0, 31 }, | |
210 | ||
211 | { CLKID_AHB_QEI, "qei", "ahb_div", | |
212 | HW_AHBCLKCTRL1, 0 }, | |
213 | { CLKID_AHB_QUADSPI0, "quadspi0", "ahb_div", | |
214 | HW_AHBCLKCTRL1, 1 }, | |
215 | { CLKID_AHB_CAMIF, "capmif", "ahb_div", | |
216 | HW_AHBCLKCTRL1, 2 }, | |
217 | { CLKID_AHB_LCDIF, "lcdif", "ahb_div", | |
218 | HW_AHBCLKCTRL1, 3 }, | |
219 | { CLKID_AHB_TIMER0, "timer0", "ahb_div", | |
220 | HW_AHBCLKCTRL1, 4 }, | |
221 | { CLKID_AHB_TIMER1, "timer1", "ahb_div", | |
222 | HW_AHBCLKCTRL1, 5 }, | |
223 | { CLKID_AHB_TIMER2, "timer2", "ahb_div", | |
224 | HW_AHBCLKCTRL1, 6 }, | |
225 | { CLKID_AHB_TIMER3, "timer3", "ahb_div", | |
226 | HW_AHBCLKCTRL1, 7 }, | |
227 | { CLKID_AHB_IRQ, "irq", "ahb_div", | |
228 | HW_AHBCLKCTRL1, 8, CLK_IGNORE_UNUSED}, | |
229 | { CLKID_AHB_RTC, "rtc", "ahb_div", | |
230 | HW_AHBCLKCTRL1, 9 }, | |
231 | { CLKID_AHB_NAND, "nand", "ahb_div", | |
232 | HW_AHBCLKCTRL1, 10 }, | |
233 | { CLKID_AHB_ADC0, "adc0", "ahb_div", | |
234 | HW_AHBCLKCTRL1, 11 }, | |
235 | { CLKID_AHB_LED, "led", "ahb_div", | |
236 | HW_AHBCLKCTRL1, 12 }, | |
237 | { CLKID_AHB_DAC0, "dac0", "ahb_div", | |
238 | HW_AHBCLKCTRL1, 13 }, | |
239 | { CLKID_AHB_LCD, "lcd", "ahb_div", | |
240 | HW_AHBCLKCTRL1, 14 }, | |
241 | { CLKID_AHB_I2S1, "i2s1", "ahb_div", | |
242 | HW_AHBCLKCTRL1, 15 }, | |
243 | { CLKID_AHB_MAC1, "mac1", "ahb_div", | |
244 | HW_AHBCLKCTRL1, 16 }, | |
245 | }; | |
246 | ||
247 | static const char __initdata *main_mux_p[] = { NULL, NULL }; | |
248 | static const char __initdata *i2s0_mux_p[] = { NULL, NULL, "i2s0m_div"}; | |
249 | static const char __initdata *i2s1_mux_p[] = { NULL, NULL, "i2s1m_div"}; | |
250 | static const char __initdata *clkout_mux_p[] = { NULL, NULL, "rtc"}; | |
251 | static u32 three_mux_table[] = {0, 1, 3}; | |
252 | ||
253 | static struct asm9260_mux_clock asm9260_mux_clks[] __initdata = { | |
254 | { 1, three_mux_table, "main_mux", main_mux_p, | |
255 | ARRAY_SIZE(main_mux_p), HW_MAINCLKSEL, }, | |
256 | { 1, three_mux_table, "uart_mux", main_mux_p, | |
257 | ARRAY_SIZE(main_mux_p), HW_UARTCLKSEL, }, | |
258 | { 1, three_mux_table, "wdt_mux", main_mux_p, | |
259 | ARRAY_SIZE(main_mux_p), HW_WDTCLKSEL, }, | |
260 | { 3, three_mux_table, "i2s0_mux", i2s0_mux_p, | |
261 | ARRAY_SIZE(i2s0_mux_p), HW_I2S0CLKSEL, }, | |
262 | { 3, three_mux_table, "i2s1_mux", i2s1_mux_p, | |
263 | ARRAY_SIZE(i2s1_mux_p), HW_I2S1CLKSEL, }, | |
264 | { 3, three_mux_table, "clkout_mux", clkout_mux_p, | |
265 | ARRAY_SIZE(clkout_mux_p), HW_CLKOUTCLKSEL, }, | |
266 | }; | |
267 | ||
268 | static void __init asm9260_acc_init(struct device_node *np) | |
269 | { | |
270 | struct clk *clk; | |
271 | const char *ref_clk, *pll_clk = "pll"; | |
272 | u32 rate; | |
273 | int n; | |
274 | u32 accuracy = 0; | |
275 | ||
276 | base = of_io_request_and_map(np, 0, np->name); | |
b1ed311b | 277 | if (IS_ERR(base)) |
ec6415dc OR |
278 | panic("%s: unable to map resource", np->name); |
279 | ||
280 | /* register pll */ | |
281 | rate = (ioread32(base + HW_SYSPLLCTRL) & 0xffff) * 1000000; | |
282 | ||
283 | ref_clk = of_clk_get_parent_name(np, 0); | |
284 | accuracy = clk_get_accuracy(__clk_lookup(ref_clk)); | |
285 | clk = clk_register_fixed_rate_with_accuracy(NULL, pll_clk, | |
286 | ref_clk, 0, rate, accuracy); | |
287 | ||
288 | if (IS_ERR(clk)) | |
289 | panic("%s: can't register REFCLK. Check DT!", np->name); | |
290 | ||
291 | for (n = 0; n < ARRAY_SIZE(asm9260_mux_clks); n++) { | |
292 | const struct asm9260_mux_clock *mc = &asm9260_mux_clks[n]; | |
293 | ||
294 | mc->parent_names[0] = ref_clk; | |
295 | mc->parent_names[1] = pll_clk; | |
296 | clk = clk_register_mux_table(NULL, mc->name, mc->parent_names, | |
297 | mc->num_parents, mc->flags, base + mc->offset, | |
298 | 0, mc->mask, 0, mc->table, &asm9260_clk_lock); | |
299 | } | |
300 | ||
301 | /* clock mux gate cells */ | |
302 | for (n = 0; n < ARRAY_SIZE(asm9260_mux_gates); n++) { | |
303 | const struct asm9260_gate_data *gd = &asm9260_mux_gates[n]; | |
304 | ||
305 | clk = clk_register_gate(NULL, gd->name, | |
306 | gd->parent_name, gd->flags | CLK_SET_RATE_PARENT, | |
307 | base + gd->reg, gd->bit_idx, 0, &asm9260_clk_lock); | |
308 | } | |
309 | ||
310 | /* clock div cells */ | |
311 | for (n = 0; n < ARRAY_SIZE(asm9260_div_clks); n++) { | |
312 | const struct asm9260_div_clk *dc = &asm9260_div_clks[n]; | |
313 | ||
314 | clks[dc->idx] = clk_register_divider(NULL, dc->name, | |
315 | dc->parent_name, CLK_SET_RATE_PARENT, | |
316 | base + dc->reg, 0, 8, CLK_DIVIDER_ONE_BASED, | |
317 | &asm9260_clk_lock); | |
318 | } | |
319 | ||
320 | /* clock ahb gate cells */ | |
321 | for (n = 0; n < ARRAY_SIZE(asm9260_ahb_gates); n++) { | |
322 | const struct asm9260_gate_data *gd = &asm9260_ahb_gates[n]; | |
323 | ||
324 | clks[gd->idx] = clk_register_gate(NULL, gd->name, | |
325 | gd->parent_name, gd->flags, base + gd->reg, | |
326 | gd->bit_idx, 0, &asm9260_clk_lock); | |
327 | } | |
328 | ||
329 | /* check for errors on leaf clocks */ | |
330 | for (n = 0; n < MAX_CLKS; n++) { | |
331 | if (!IS_ERR(clks[n])) | |
332 | continue; | |
333 | ||
334 | pr_err("%s: Unable to register leaf clock %d\n", | |
335 | np->full_name, n); | |
336 | goto fail; | |
337 | } | |
338 | ||
339 | /* register clk-provider */ | |
340 | clk_data.clks = clks; | |
341 | clk_data.clk_num = MAX_CLKS; | |
342 | of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); | |
343 | return; | |
344 | fail: | |
345 | iounmap(base); | |
346 | } | |
347 | CLK_OF_DECLARE(asm9260_acc, "alphascale,asm9260-clock-controller", | |
348 | asm9260_acc_init); |