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1 | /* |
2 | * pxa910 clock framework source file | |
3 | * | |
4 | * Copyright (C) 2012 Marvell | |
5 | * Chao Xie <xiechao.mail@gmail.com> | |
6 | * | |
7 | * This file is licensed under the terms of the GNU General Public | |
8 | * License version 2. This program is licensed "as is" without any | |
9 | * warranty of any kind, whether express or implied. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/io.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/of_address.h> | |
19 | ||
20 | #include <dt-bindings/clock/marvell,pxa910.h> | |
21 | ||
22 | #include "clk.h" | |
23 | #include "reset.h" | |
24 | ||
25 | #define APBC_RTC 0x28 | |
26 | #define APBC_TWSI0 0x2c | |
27 | #define APBC_KPC 0x18 | |
28 | #define APBC_UART0 0x0 | |
29 | #define APBC_UART1 0x4 | |
30 | #define APBC_GPIO 0x8 | |
31 | #define APBC_PWM0 0xc | |
32 | #define APBC_PWM1 0x10 | |
33 | #define APBC_PWM2 0x14 | |
34 | #define APBC_PWM3 0x18 | |
35 | #define APBC_SSP0 0x1c | |
36 | #define APBC_SSP1 0x20 | |
37 | #define APBC_SSP2 0x4c | |
24c65a02 CX |
38 | #define APBC_TIMER0 0x30 |
39 | #define APBC_TIMER1 0x44 | |
2bc61da9 CX |
40 | #define APBCP_TWSI1 0x28 |
41 | #define APBCP_UART2 0x1c | |
42 | #define APMU_SDH0 0x54 | |
43 | #define APMU_SDH1 0x58 | |
44 | #define APMU_USB 0x5c | |
45 | #define APMU_DISP0 0x4c | |
46 | #define APMU_CCIC0 0x50 | |
47 | #define APMU_DFC 0x60 | |
48 | #define MPMU_UART_PLL 0x14 | |
49 | ||
50 | struct pxa910_clk_unit { | |
51 | struct mmp_clk_unit unit; | |
52 | void __iomem *mpmu_base; | |
53 | void __iomem *apmu_base; | |
54 | void __iomem *apbc_base; | |
55 | void __iomem *apbcp_base; | |
56 | }; | |
57 | ||
58 | static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = { | |
59 | {PXA910_CLK_CLK32, "clk32", NULL, CLK_IS_ROOT, 32768}, | |
60 | {PXA910_CLK_VCTCXO, "vctcxo", NULL, CLK_IS_ROOT, 26000000}, | |
61 | {PXA910_CLK_PLL1, "pll1", NULL, CLK_IS_ROOT, 624000000}, | |
a35247c6 | 62 | {PXA910_CLK_USB_PLL, "usb_pll", NULL, CLK_IS_ROOT, 480000000}, |
2bc61da9 CX |
63 | }; |
64 | ||
65 | static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = { | |
66 | {PXA910_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0}, | |
67 | {PXA910_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0}, | |
68 | {PXA910_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0}, | |
69 | {PXA910_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0}, | |
70 | {PXA910_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0}, | |
71 | {PXA910_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0}, | |
72 | {PXA910_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0}, | |
73 | {PXA910_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0}, | |
74 | {PXA910_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0}, | |
24c65a02 | 75 | {PXA910_CLK_PLL1_192, "pll1_192", "pll1_96", 1, 2, 0}, |
2bc61da9 CX |
76 | {PXA910_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0}, |
77 | {PXA910_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0}, | |
78 | {PXA910_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0}, | |
79 | {PXA910_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0}, | |
80 | }; | |
81 | ||
82 | static struct mmp_clk_factor_masks uart_factor_masks = { | |
83 | .factor = 2, | |
84 | .num_mask = 0x1fff, | |
85 | .den_mask = 0x1fff, | |
86 | .num_shift = 16, | |
87 | .den_shift = 0, | |
88 | }; | |
89 | ||
90 | static struct mmp_clk_factor_tbl uart_factor_tbl[] = { | |
91 | {.num = 8125, .den = 1536}, /*14.745MHZ */ | |
92 | }; | |
93 | ||
94 | static void pxa910_pll_init(struct pxa910_clk_unit *pxa_unit) | |
95 | { | |
96 | struct clk *clk; | |
97 | struct mmp_clk_unit *unit = &pxa_unit->unit; | |
98 | ||
99 | mmp_register_fixed_rate_clks(unit, fixed_rate_clks, | |
100 | ARRAY_SIZE(fixed_rate_clks)); | |
101 | ||
102 | mmp_register_fixed_factor_clks(unit, fixed_factor_clks, | |
103 | ARRAY_SIZE(fixed_factor_clks)); | |
104 | ||
105 | clk = mmp_clk_register_factor("uart_pll", "pll1_4", | |
106 | CLK_SET_RATE_PARENT, | |
107 | pxa_unit->mpmu_base + MPMU_UART_PLL, | |
108 | &uart_factor_masks, uart_factor_tbl, | |
109 | ARRAY_SIZE(uart_factor_tbl), NULL); | |
110 | mmp_clk_add(unit, PXA910_CLK_UART_PLL, clk); | |
111 | } | |
112 | ||
113 | static DEFINE_SPINLOCK(uart0_lock); | |
114 | static DEFINE_SPINLOCK(uart1_lock); | |
115 | static DEFINE_SPINLOCK(uart2_lock); | |
116 | static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"}; | |
117 | ||
118 | static DEFINE_SPINLOCK(ssp0_lock); | |
119 | static DEFINE_SPINLOCK(ssp1_lock); | |
120 | static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"}; | |
121 | ||
24c65a02 CX |
122 | static DEFINE_SPINLOCK(timer0_lock); |
123 | static DEFINE_SPINLOCK(timer1_lock); | |
124 | static const char *timer_parent_names[] = {"pll1_48", "clk32", "pll1_96"}; | |
125 | ||
2bc61da9 CX |
126 | static DEFINE_SPINLOCK(reset_lock); |
127 | ||
128 | static struct mmp_param_mux_clk apbc_mux_clks[] = { | |
129 | {0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock}, | |
130 | {0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock}, | |
131 | {0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock}, | |
132 | {0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock}, | |
24c65a02 CX |
133 | {0, "timer0_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER0, 4, 3, 0, &timer0_lock}, |
134 | {0, "timer1_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER1, 4, 3, 0, &timer1_lock}, | |
2bc61da9 CX |
135 | }; |
136 | ||
137 | static struct mmp_param_mux_clk apbcp_mux_clks[] = { | |
138 | {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock}, | |
139 | }; | |
140 | ||
141 | static struct mmp_param_gate_clk apbc_gate_clks[] = { | |
142 | {PXA910_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock}, | |
143 | {PXA910_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock}, | |
144 | {PXA910_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, | |
145 | {PXA910_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, | |
146 | {PXA910_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock}, | |
147 | {PXA910_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock}, | |
148 | {PXA910_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock}, | |
149 | {PXA910_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock}, | |
150 | /* The gate clocks has mux parent. */ | |
151 | {PXA910_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock}, | |
152 | {PXA910_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock}, | |
153 | {PXA910_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock}, | |
154 | {PXA910_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock}, | |
24c65a02 CX |
155 | {PXA910_CLK_TIMER0, "timer0_clk", "timer0_mux", CLK_SET_RATE_PARENT, APBC_TIMER0, 0x3, 0x3, 0x0, 0, &timer0_lock}, |
156 | {PXA910_CLK_TIMER1, "timer1_clk", "timer1_mux", CLK_SET_RATE_PARENT, APBC_TIMER1, 0x3, 0x3, 0x0, 0, &timer1_lock}, | |
2bc61da9 CX |
157 | }; |
158 | ||
159 | static struct mmp_param_gate_clk apbcp_gate_clks[] = { | |
160 | {PXA910_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBCP_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock}, | |
161 | /* The gate clocks has mux parent. */ | |
162 | {PXA910_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock}, | |
163 | }; | |
164 | ||
165 | static void pxa910_apb_periph_clk_init(struct pxa910_clk_unit *pxa_unit) | |
166 | { | |
167 | struct mmp_clk_unit *unit = &pxa_unit->unit; | |
168 | ||
169 | mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base, | |
170 | ARRAY_SIZE(apbc_mux_clks)); | |
171 | ||
172 | mmp_register_mux_clks(unit, apbcp_mux_clks, pxa_unit->apbcp_base, | |
173 | ARRAY_SIZE(apbcp_mux_clks)); | |
174 | ||
175 | mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base, | |
176 | ARRAY_SIZE(apbc_gate_clks)); | |
177 | ||
178 | mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->apbcp_base, | |
179 | ARRAY_SIZE(apbcp_gate_clks)); | |
180 | } | |
181 | ||
182 | static DEFINE_SPINLOCK(sdh0_lock); | |
183 | static DEFINE_SPINLOCK(sdh1_lock); | |
184 | static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"}; | |
185 | ||
186 | static DEFINE_SPINLOCK(usb_lock); | |
187 | ||
188 | static DEFINE_SPINLOCK(disp0_lock); | |
189 | static const char *disp_parent_names[] = {"pll1_2", "pll1_12"}; | |
190 | ||
191 | static DEFINE_SPINLOCK(ccic0_lock); | |
192 | static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"}; | |
193 | static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"}; | |
194 | ||
195 | static struct mmp_param_mux_clk apmu_mux_clks[] = { | |
196 | {0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock}, | |
197 | {0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock}, | |
198 | {0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock}, | |
199 | {0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock}, | |
200 | {0, "ccic0_phy_mux", ccic_phy_parent_names, ARRAY_SIZE(ccic_phy_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 7, 1, 0, &ccic0_lock}, | |
201 | }; | |
202 | ||
203 | static struct mmp_param_div_clk apmu_div_clks[] = { | |
204 | {0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock}, | |
205 | }; | |
206 | ||
207 | static struct mmp_param_gate_clk apmu_gate_clks[] = { | |
208 | {PXA910_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL}, | |
209 | {PXA910_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock}, | |
210 | {PXA910_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock}, | |
211 | /* The gate clocks has mux parent. */ | |
212 | {PXA910_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock}, | |
213 | {PXA910_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock}, | |
214 | {PXA910_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock}, | |
215 | {PXA910_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock}, | |
216 | {PXA910_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock}, | |
217 | {PXA910_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock}, | |
218 | }; | |
219 | ||
220 | static void pxa910_axi_periph_clk_init(struct pxa910_clk_unit *pxa_unit) | |
221 | { | |
222 | struct mmp_clk_unit *unit = &pxa_unit->unit; | |
223 | ||
224 | mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base, | |
225 | ARRAY_SIZE(apmu_mux_clks)); | |
226 | ||
227 | mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base, | |
228 | ARRAY_SIZE(apmu_div_clks)); | |
229 | ||
230 | mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base, | |
231 | ARRAY_SIZE(apmu_gate_clks)); | |
232 | } | |
233 | ||
234 | static void pxa910_clk_reset_init(struct device_node *np, | |
235 | struct pxa910_clk_unit *pxa_unit) | |
236 | { | |
237 | struct mmp_clk_reset_cell *cells; | |
238 | int i, base, nr_resets_apbc, nr_resets_apbcp, nr_resets; | |
239 | ||
240 | nr_resets_apbc = ARRAY_SIZE(apbc_gate_clks); | |
241 | nr_resets_apbcp = ARRAY_SIZE(apbcp_gate_clks); | |
242 | nr_resets = nr_resets_apbc + nr_resets_apbcp; | |
243 | cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL); | |
244 | if (!cells) | |
245 | return; | |
246 | ||
247 | base = 0; | |
248 | for (i = 0; i < nr_resets_apbc; i++) { | |
249 | cells[base + i].clk_id = apbc_gate_clks[i].id; | |
250 | cells[base + i].reg = | |
251 | pxa_unit->apbc_base + apbc_gate_clks[i].offset; | |
252 | cells[base + i].flags = 0; | |
253 | cells[base + i].lock = apbc_gate_clks[i].lock; | |
254 | cells[base + i].bits = 0x4; | |
255 | } | |
256 | ||
257 | base = nr_resets_apbc; | |
258 | for (i = 0; i < nr_resets_apbcp; i++) { | |
259 | cells[base + i].clk_id = apbcp_gate_clks[i].id; | |
260 | cells[base + i].reg = | |
261 | pxa_unit->apbc_base + apbc_gate_clks[i].offset; | |
262 | cells[base + i].flags = 0; | |
263 | cells[base + i].lock = apbc_gate_clks[i].lock; | |
264 | cells[base + i].bits = 0x4; | |
265 | } | |
266 | ||
267 | mmp_clk_reset_register(np, cells, nr_resets); | |
268 | } | |
269 | ||
270 | static void __init pxa910_clk_init(struct device_node *np) | |
271 | { | |
272 | struct pxa910_clk_unit *pxa_unit; | |
273 | ||
274 | pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL); | |
275 | if (!pxa_unit) | |
276 | return; | |
277 | ||
278 | pxa_unit->mpmu_base = of_iomap(np, 0); | |
279 | if (!pxa_unit->mpmu_base) { | |
280 | pr_err("failed to map mpmu registers\n"); | |
281 | return; | |
282 | } | |
283 | ||
284 | pxa_unit->apmu_base = of_iomap(np, 1); | |
285 | if (!pxa_unit->mpmu_base) { | |
286 | pr_err("failed to map apmu registers\n"); | |
287 | return; | |
288 | } | |
289 | ||
290 | pxa_unit->apbc_base = of_iomap(np, 2); | |
291 | if (!pxa_unit->apbc_base) { | |
292 | pr_err("failed to map apbc registers\n"); | |
293 | return; | |
294 | } | |
295 | ||
296 | pxa_unit->apbcp_base = of_iomap(np, 3); | |
297 | if (!pxa_unit->mpmu_base) { | |
298 | pr_err("failed to map apbcp registers\n"); | |
299 | return; | |
300 | } | |
301 | ||
302 | mmp_clk_init(np, &pxa_unit->unit, PXA910_NR_CLKS); | |
303 | ||
304 | pxa910_pll_init(pxa_unit); | |
305 | ||
306 | pxa910_apb_periph_clk_init(pxa_unit); | |
307 | ||
308 | pxa910_axi_periph_clk_init(pxa_unit); | |
309 | ||
310 | pxa910_clk_reset_init(np, pxa_unit); | |
311 | } | |
312 | ||
313 | CLK_OF_DECLARE(pxa910_clk, "marvell,pxa910-clock", pxa910_clk_init); |