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02e19a96 PW |
1 | /* |
2 | * OMAP3-specific clock framework functions | |
3 | * | |
542313cc PW |
4 | * Copyright (C) 2007-2008 Texas Instruments, Inc. |
5 | * Copyright (C) 2007-2008 Nokia Corporation | |
02e19a96 PW |
6 | * |
7 | * Written by Paul Walmsley | |
542313cc | 8 | * Testing and integration fixes by Jouni Högander |
02e19a96 PW |
9 | * |
10 | * Parts of this code are based on code written by | |
11 | * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | #undef DEBUG | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/list.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/delay.h> | |
25 | #include <linux/clk.h> | |
26 | #include <linux/io.h> | |
542313cc | 27 | #include <linux/limits.h> |
fbd3bdb2 | 28 | #include <linux/bitops.h> |
02e19a96 | 29 | |
a09e64fb RK |
30 | #include <mach/clock.h> |
31 | #include <mach/sram.h> | |
02e19a96 | 32 | #include <asm/div64.h> |
44dc9d02 | 33 | #include <asm/clkdev.h> |
02e19a96 | 34 | |
f8de9b2c | 35 | #include <mach/sdrc.h> |
02e19a96 | 36 | #include "clock.h" |
02e19a96 PW |
37 | #include "prm.h" |
38 | #include "prm-regbits-34xx.h" | |
39 | #include "cm.h" | |
40 | #include "cm-regbits-34xx.h" | |
41 | ||
548d8495 RK |
42 | static const struct clkops clkops_noncore_dpll_ops; |
43 | ||
44 | #include "clock34xx.h" | |
45 | ||
44dc9d02 RK |
46 | struct omap_clk { |
47 | u32 cpu; | |
48 | struct clk_lookup lk; | |
49 | }; | |
50 | ||
51 | #define CLK(dev, con, ck, cp) \ | |
52 | { \ | |
53 | .cpu = cp, \ | |
54 | .lk = { \ | |
55 | .dev_id = dev, \ | |
56 | .con_id = con, \ | |
57 | .clk = ck, \ | |
58 | }, \ | |
59 | } | |
60 | ||
61 | #define CK_343X (1 << 0) | |
62 | #define CK_3430ES1 (1 << 1) | |
63 | #define CK_3430ES2 (1 << 2) | |
64 | ||
65 | static struct omap_clk omap34xx_clks[] = { | |
66 | CLK(NULL, "omap_32k_fck", &omap_32k_fck, CK_343X), | |
67 | CLK(NULL, "virt_12m_ck", &virt_12m_ck, CK_343X), | |
68 | CLK(NULL, "virt_13m_ck", &virt_13m_ck, CK_343X), | |
69 | CLK(NULL, "virt_16_8m_ck", &virt_16_8m_ck, CK_3430ES2), | |
70 | CLK(NULL, "virt_19_2m_ck", &virt_19_2m_ck, CK_343X), | |
71 | CLK(NULL, "virt_26m_ck", &virt_26m_ck, CK_343X), | |
72 | CLK(NULL, "virt_38_4m_ck", &virt_38_4m_ck, CK_343X), | |
73 | CLK(NULL, "osc_sys_ck", &osc_sys_ck, CK_343X), | |
74 | CLK(NULL, "sys_ck", &sys_ck, CK_343X), | |
75 | CLK(NULL, "sys_altclk", &sys_altclk, CK_343X), | |
76 | CLK(NULL, "mcbsp_clks", &mcbsp_clks, CK_343X), | |
77 | CLK(NULL, "sys_clkout1", &sys_clkout1, CK_343X), | |
78 | CLK(NULL, "dpll1_ck", &dpll1_ck, CK_343X), | |
79 | CLK(NULL, "dpll1_x2_ck", &dpll1_x2_ck, CK_343X), | |
80 | CLK(NULL, "dpll1_x2m2_ck", &dpll1_x2m2_ck, CK_343X), | |
81 | CLK(NULL, "dpll2_ck", &dpll2_ck, CK_343X), | |
82 | CLK(NULL, "dpll2_m2_ck", &dpll2_m2_ck, CK_343X), | |
83 | CLK(NULL, "dpll3_ck", &dpll3_ck, CK_343X), | |
84 | CLK(NULL, "core_ck", &core_ck, CK_343X), | |
85 | CLK(NULL, "dpll3_x2_ck", &dpll3_x2_ck, CK_343X), | |
86 | CLK(NULL, "dpll3_m2_ck", &dpll3_m2_ck, CK_343X), | |
87 | CLK(NULL, "dpll3_m2x2_ck", &dpll3_m2x2_ck, CK_343X), | |
88 | CLK(NULL, "dpll3_m3_ck", &dpll3_m3_ck, CK_343X), | |
89 | CLK(NULL, "dpll3_m3x2_ck", &dpll3_m3x2_ck, CK_343X), | |
90 | CLK(NULL, "emu_core_alwon_ck", &emu_core_alwon_ck, CK_343X), | |
91 | CLK(NULL, "dpll4_ck", &dpll4_ck, CK_343X), | |
92 | CLK(NULL, "dpll4_x2_ck", &dpll4_x2_ck, CK_343X), | |
93 | CLK(NULL, "omap_96m_alwon_fck", &omap_96m_alwon_fck, CK_343X), | |
94 | CLK(NULL, "omap_96m_fck", &omap_96m_fck, CK_343X), | |
95 | CLK(NULL, "cm_96m_fck", &cm_96m_fck, CK_343X), | |
44dc9d02 RK |
96 | CLK(NULL, "omap_54m_fck", &omap_54m_fck, CK_343X), |
97 | CLK(NULL, "omap_48m_fck", &omap_48m_fck, CK_343X), | |
98 | CLK(NULL, "omap_12m_fck", &omap_12m_fck, CK_343X), | |
99 | CLK(NULL, "dpll4_m2_ck", &dpll4_m2_ck, CK_343X), | |
100 | CLK(NULL, "dpll4_m2x2_ck", &dpll4_m2x2_ck, CK_343X), | |
101 | CLK(NULL, "dpll4_m3_ck", &dpll4_m3_ck, CK_343X), | |
102 | CLK(NULL, "dpll4_m3x2_ck", &dpll4_m3x2_ck, CK_343X), | |
103 | CLK(NULL, "dpll4_m4_ck", &dpll4_m4_ck, CK_343X), | |
104 | CLK(NULL, "dpll4_m4x2_ck", &dpll4_m4x2_ck, CK_343X), | |
105 | CLK(NULL, "dpll4_m5_ck", &dpll4_m5_ck, CK_343X), | |
106 | CLK(NULL, "dpll4_m5x2_ck", &dpll4_m5x2_ck, CK_343X), | |
107 | CLK(NULL, "dpll4_m6_ck", &dpll4_m6_ck, CK_343X), | |
108 | CLK(NULL, "dpll4_m6x2_ck", &dpll4_m6x2_ck, CK_343X), | |
109 | CLK(NULL, "emu_per_alwon_ck", &emu_per_alwon_ck, CK_343X), | |
110 | CLK(NULL, "dpll5_ck", &dpll5_ck, CK_3430ES2), | |
111 | CLK(NULL, "dpll5_m2_ck", &dpll5_m2_ck, CK_3430ES2), | |
44dc9d02 RK |
112 | CLK(NULL, "clkout2_src_ck", &clkout2_src_ck, CK_343X), |
113 | CLK(NULL, "sys_clkout2", &sys_clkout2, CK_343X), | |
114 | CLK(NULL, "corex2_fck", &corex2_fck, CK_343X), | |
115 | CLK(NULL, "dpll1_fck", &dpll1_fck, CK_343X), | |
116 | CLK(NULL, "mpu_ck", &mpu_ck, CK_343X), | |
117 | CLK(NULL, "arm_fck", &arm_fck, CK_343X), | |
118 | CLK(NULL, "emu_mpu_alwon_ck", &emu_mpu_alwon_ck, CK_343X), | |
119 | CLK(NULL, "dpll2_fck", &dpll2_fck, CK_343X), | |
120 | CLK(NULL, "iva2_ck", &iva2_ck, CK_343X), | |
121 | CLK(NULL, "l3_ick", &l3_ick, CK_343X), | |
122 | CLK(NULL, "l4_ick", &l4_ick, CK_343X), | |
123 | CLK(NULL, "rm_ick", &rm_ick, CK_343X), | |
124 | CLK(NULL, "gfx_l3_ck", &gfx_l3_ck, CK_3430ES1), | |
125 | CLK(NULL, "gfx_l3_fck", &gfx_l3_fck, CK_3430ES1), | |
126 | CLK(NULL, "gfx_l3_ick", &gfx_l3_ick, CK_3430ES1), | |
127 | CLK(NULL, "gfx_cg1_ck", &gfx_cg1_ck, CK_3430ES1), | |
128 | CLK(NULL, "gfx_cg2_ck", &gfx_cg2_ck, CK_3430ES1), | |
129 | CLK(NULL, "sgx_fck", &sgx_fck, CK_3430ES2), | |
130 | CLK(NULL, "sgx_ick", &sgx_ick, CK_3430ES2), | |
131 | CLK(NULL, "d2d_26m_fck", &d2d_26m_fck, CK_3430ES1), | |
8111b221 KH |
132 | CLK(NULL, "modem_fck", &modem_fck, CK_343X), |
133 | CLK(NULL, "sad2d_ick", &sad2d_ick, CK_343X), | |
134 | CLK(NULL, "mad2d_ick", &mad2d_ick, CK_343X), | |
44dc9d02 RK |
135 | CLK(NULL, "gpt10_fck", &gpt10_fck, CK_343X), |
136 | CLK(NULL, "gpt11_fck", &gpt11_fck, CK_343X), | |
137 | CLK(NULL, "cpefuse_fck", &cpefuse_fck, CK_3430ES2), | |
138 | CLK(NULL, "ts_fck", &ts_fck, CK_3430ES2), | |
139 | CLK(NULL, "usbtll_fck", &usbtll_fck, CK_3430ES2), | |
140 | CLK(NULL, "core_96m_fck", &core_96m_fck, CK_343X), | |
6f7607cc RK |
141 | CLK("mmci-omap-hs.2", "fck", &mmchs3_fck, CK_3430ES2), |
142 | CLK("mmci-omap-hs.1", "fck", &mmchs2_fck, CK_343X), | |
44dc9d02 | 143 | CLK(NULL, "mspro_fck", &mspro_fck, CK_343X), |
6f7607cc | 144 | CLK("mmci-omap-hs.0", "fck", &mmchs1_fck, CK_343X), |
1d14de08 RK |
145 | CLK("i2c_omap.3", "fck", &i2c3_fck, CK_343X), |
146 | CLK("i2c_omap.2", "fck", &i2c2_fck, CK_343X), | |
147 | CLK("i2c_omap.1", "fck", &i2c1_fck, CK_343X), | |
b820ce4e RK |
148 | CLK("omap-mcbsp.5", "fck", &mcbsp5_fck, CK_343X), |
149 | CLK("omap-mcbsp.1", "fck", &mcbsp1_fck, CK_343X), | |
44dc9d02 | 150 | CLK(NULL, "core_48m_fck", &core_48m_fck, CK_343X), |
1b5715ec RK |
151 | CLK("omap2_mcspi.4", "fck", &mcspi4_fck, CK_343X), |
152 | CLK("omap2_mcspi.3", "fck", &mcspi3_fck, CK_343X), | |
153 | CLK("omap2_mcspi.2", "fck", &mcspi2_fck, CK_343X), | |
154 | CLK("omap2_mcspi.1", "fck", &mcspi1_fck, CK_343X), | |
44dc9d02 RK |
155 | CLK(NULL, "uart2_fck", &uart2_fck, CK_343X), |
156 | CLK(NULL, "uart1_fck", &uart1_fck, CK_343X), | |
157 | CLK(NULL, "fshostusb_fck", &fshostusb_fck, CK_3430ES1), | |
158 | CLK(NULL, "core_12m_fck", &core_12m_fck, CK_343X), | |
cc51c9d4 | 159 | CLK("omap_hdq.0", "fck", &hdq_fck, CK_343X), |
44dc9d02 RK |
160 | CLK(NULL, "ssi_ssr_fck", &ssi_ssr_fck, CK_343X), |
161 | CLK(NULL, "ssi_sst_fck", &ssi_sst_fck, CK_343X), | |
162 | CLK(NULL, "core_l3_ick", &core_l3_ick, CK_343X), | |
4ea60b0c | 163 | CLK("musb_hdrc", "ick", &hsotgusb_ick, CK_343X), |
44dc9d02 RK |
164 | CLK(NULL, "sdrc_ick", &sdrc_ick, CK_343X), |
165 | CLK(NULL, "gpmc_fck", &gpmc_fck, CK_343X), | |
166 | CLK(NULL, "security_l3_ick", &security_l3_ick, CK_343X), | |
167 | CLK(NULL, "pka_ick", &pka_ick, CK_343X), | |
168 | CLK(NULL, "core_l4_ick", &core_l4_ick, CK_343X), | |
169 | CLK(NULL, "usbtll_ick", &usbtll_ick, CK_3430ES2), | |
6f7607cc | 170 | CLK("mmci-omap-hs.2", "ick", &mmchs3_ick, CK_3430ES2), |
44dc9d02 RK |
171 | CLK(NULL, "icr_ick", &icr_ick, CK_343X), |
172 | CLK(NULL, "aes2_ick", &aes2_ick, CK_343X), | |
173 | CLK(NULL, "sha12_ick", &sha12_ick, CK_343X), | |
174 | CLK(NULL, "des2_ick", &des2_ick, CK_343X), | |
6f7607cc RK |
175 | CLK("mmci-omap-hs.1", "ick", &mmchs2_ick, CK_343X), |
176 | CLK("mmci-omap-hs.0", "ick", &mmchs1_ick, CK_343X), | |
44dc9d02 | 177 | CLK(NULL, "mspro_ick", &mspro_ick, CK_343X), |
cc51c9d4 | 178 | CLK("omap_hdq.0", "ick", &hdq_ick, CK_343X), |
1b5715ec RK |
179 | CLK("omap2_mcspi.4", "ick", &mcspi4_ick, CK_343X), |
180 | CLK("omap2_mcspi.3", "ick", &mcspi3_ick, CK_343X), | |
181 | CLK("omap2_mcspi.2", "ick", &mcspi2_ick, CK_343X), | |
182 | CLK("omap2_mcspi.1", "ick", &mcspi1_ick, CK_343X), | |
1d14de08 RK |
183 | CLK("i2c_omap.3", "ick", &i2c3_ick, CK_343X), |
184 | CLK("i2c_omap.2", "ick", &i2c2_ick, CK_343X), | |
185 | CLK("i2c_omap.1", "ick", &i2c1_ick, CK_343X), | |
44dc9d02 RK |
186 | CLK(NULL, "uart2_ick", &uart2_ick, CK_343X), |
187 | CLK(NULL, "uart1_ick", &uart1_ick, CK_343X), | |
188 | CLK(NULL, "gpt11_ick", &gpt11_ick, CK_343X), | |
189 | CLK(NULL, "gpt10_ick", &gpt10_ick, CK_343X), | |
b820ce4e RK |
190 | CLK("omap-mcbsp.5", "ick", &mcbsp5_ick, CK_343X), |
191 | CLK("omap-mcbsp.1", "ick", &mcbsp1_ick, CK_343X), | |
44dc9d02 RK |
192 | CLK(NULL, "fac_ick", &fac_ick, CK_3430ES1), |
193 | CLK(NULL, "mailboxes_ick", &mailboxes_ick, CK_343X), | |
194 | CLK(NULL, "omapctrl_ick", &omapctrl_ick, CK_343X), | |
195 | CLK(NULL, "ssi_l4_ick", &ssi_l4_ick, CK_343X), | |
196 | CLK(NULL, "ssi_ick", &ssi_ick, CK_343X), | |
197 | CLK(NULL, "usb_l4_ick", &usb_l4_ick, CK_3430ES1), | |
198 | CLK(NULL, "security_l4_ick2", &security_l4_ick2, CK_343X), | |
199 | CLK(NULL, "aes1_ick", &aes1_ick, CK_343X), | |
eeec7c8d | 200 | CLK("omap_rng", "ick", &rng_ick, CK_343X), |
44dc9d02 RK |
201 | CLK(NULL, "sha11_ick", &sha11_ick, CK_343X), |
202 | CLK(NULL, "des1_ick", &des1_ick, CK_343X), | |
005187ee TL |
203 | CLK("omapfb", "dss1_fck", &dss1_alwon_fck, CK_343X), |
204 | CLK("omapfb", "tv_fck", &dss_tv_fck, CK_343X), | |
205 | CLK("omapfb", "video_fck", &dss_96m_fck, CK_343X), | |
206 | CLK("omapfb", "dss2_fck", &dss2_alwon_fck, CK_343X), | |
207 | CLK("omapfb", "ick", &dss_ick, CK_343X), | |
44dc9d02 RK |
208 | CLK(NULL, "cam_mclk", &cam_mclk, CK_343X), |
209 | CLK(NULL, "cam_ick", &cam_ick, CK_343X), | |
6c8fe0b9 | 210 | CLK(NULL, "csi2_96m_fck", &csi2_96m_fck, CK_343X), |
44dc9d02 RK |
211 | CLK(NULL, "usbhost_120m_fck", &usbhost_120m_fck, CK_3430ES2), |
212 | CLK(NULL, "usbhost_48m_fck", &usbhost_48m_fck, CK_3430ES2), | |
213 | CLK(NULL, "usbhost_ick", &usbhost_ick, CK_3430ES2), | |
44dc9d02 RK |
214 | CLK(NULL, "usim_fck", &usim_fck, CK_3430ES2), |
215 | CLK(NULL, "gpt1_fck", &gpt1_fck, CK_343X), | |
216 | CLK(NULL, "wkup_32k_fck", &wkup_32k_fck, CK_343X), | |
217 | CLK(NULL, "gpio1_dbck", &gpio1_dbck, CK_343X), | |
39a80c7f | 218 | CLK("omap_wdt", "fck", &wdt2_fck, CK_343X), |
44dc9d02 RK |
219 | CLK(NULL, "wkup_l4_ick", &wkup_l4_ick, CK_343X), |
220 | CLK(NULL, "usim_ick", &usim_ick, CK_3430ES2), | |
39a80c7f | 221 | CLK("omap_wdt", "ick", &wdt2_ick, CK_343X), |
44dc9d02 RK |
222 | CLK(NULL, "wdt1_ick", &wdt1_ick, CK_343X), |
223 | CLK(NULL, "gpio1_ick", &gpio1_ick, CK_343X), | |
224 | CLK(NULL, "omap_32ksync_ick", &omap_32ksync_ick, CK_343X), | |
225 | CLK(NULL, "gpt12_ick", &gpt12_ick, CK_343X), | |
226 | CLK(NULL, "gpt1_ick", &gpt1_ick, CK_343X), | |
227 | CLK(NULL, "per_96m_fck", &per_96m_fck, CK_343X), | |
228 | CLK(NULL, "per_48m_fck", &per_48m_fck, CK_343X), | |
229 | CLK(NULL, "uart3_fck", &uart3_fck, CK_343X), | |
230 | CLK(NULL, "gpt2_fck", &gpt2_fck, CK_343X), | |
231 | CLK(NULL, "gpt3_fck", &gpt3_fck, CK_343X), | |
232 | CLK(NULL, "gpt4_fck", &gpt4_fck, CK_343X), | |
233 | CLK(NULL, "gpt5_fck", &gpt5_fck, CK_343X), | |
234 | CLK(NULL, "gpt6_fck", &gpt6_fck, CK_343X), | |
235 | CLK(NULL, "gpt7_fck", &gpt7_fck, CK_343X), | |
236 | CLK(NULL, "gpt8_fck", &gpt8_fck, CK_343X), | |
237 | CLK(NULL, "gpt9_fck", &gpt9_fck, CK_343X), | |
238 | CLK(NULL, "per_32k_alwon_fck", &per_32k_alwon_fck, CK_343X), | |
239 | CLK(NULL, "gpio6_dbck", &gpio6_dbck, CK_343X), | |
240 | CLK(NULL, "gpio5_dbck", &gpio5_dbck, CK_343X), | |
241 | CLK(NULL, "gpio4_dbck", &gpio4_dbck, CK_343X), | |
242 | CLK(NULL, "gpio3_dbck", &gpio3_dbck, CK_343X), | |
243 | CLK(NULL, "gpio2_dbck", &gpio2_dbck, CK_343X), | |
244 | CLK(NULL, "wdt3_fck", &wdt3_fck, CK_343X), | |
245 | CLK(NULL, "per_l4_ick", &per_l4_ick, CK_343X), | |
246 | CLK(NULL, "gpio6_ick", &gpio6_ick, CK_343X), | |
247 | CLK(NULL, "gpio5_ick", &gpio5_ick, CK_343X), | |
248 | CLK(NULL, "gpio4_ick", &gpio4_ick, CK_343X), | |
249 | CLK(NULL, "gpio3_ick", &gpio3_ick, CK_343X), | |
250 | CLK(NULL, "gpio2_ick", &gpio2_ick, CK_343X), | |
251 | CLK(NULL, "wdt3_ick", &wdt3_ick, CK_343X), | |
252 | CLK(NULL, "uart3_ick", &uart3_ick, CK_343X), | |
253 | CLK(NULL, "gpt9_ick", &gpt9_ick, CK_343X), | |
254 | CLK(NULL, "gpt8_ick", &gpt8_ick, CK_343X), | |
255 | CLK(NULL, "gpt7_ick", &gpt7_ick, CK_343X), | |
256 | CLK(NULL, "gpt6_ick", &gpt6_ick, CK_343X), | |
257 | CLK(NULL, "gpt5_ick", &gpt5_ick, CK_343X), | |
258 | CLK(NULL, "gpt4_ick", &gpt4_ick, CK_343X), | |
259 | CLK(NULL, "gpt3_ick", &gpt3_ick, CK_343X), | |
260 | CLK(NULL, "gpt2_ick", &gpt2_ick, CK_343X), | |
b820ce4e RK |
261 | CLK("omap-mcbsp.2", "ick", &mcbsp2_ick, CK_343X), |
262 | CLK("omap-mcbsp.3", "ick", &mcbsp3_ick, CK_343X), | |
263 | CLK("omap-mcbsp.4", "ick", &mcbsp4_ick, CK_343X), | |
264 | CLK("omap-mcbsp.2", "fck", &mcbsp2_fck, CK_343X), | |
265 | CLK("omap-mcbsp.3", "fck", &mcbsp3_fck, CK_343X), | |
266 | CLK("omap-mcbsp.4", "fck", &mcbsp4_fck, CK_343X), | |
44dc9d02 RK |
267 | CLK(NULL, "emu_src_ck", &emu_src_ck, CK_343X), |
268 | CLK(NULL, "pclk_fck", &pclk_fck, CK_343X), | |
269 | CLK(NULL, "pclkx2_fck", &pclkx2_fck, CK_343X), | |
270 | CLK(NULL, "atclk_fck", &atclk_fck, CK_343X), | |
271 | CLK(NULL, "traceclk_src_fck", &traceclk_src_fck, CK_343X), | |
272 | CLK(NULL, "traceclk_fck", &traceclk_fck, CK_343X), | |
273 | CLK(NULL, "sr1_fck", &sr1_fck, CK_343X), | |
274 | CLK(NULL, "sr2_fck", &sr2_fck, CK_343X), | |
275 | CLK(NULL, "sr_l4_ick", &sr_l4_ick, CK_343X), | |
276 | CLK(NULL, "secure_32k_fck", &secure_32k_fck, CK_343X), | |
277 | CLK(NULL, "gpt12_fck", &gpt12_fck, CK_343X), | |
278 | CLK(NULL, "wdt1_fck", &wdt1_fck, CK_343X), | |
279 | }; | |
280 | ||
542313cc PW |
281 | /* CM_AUTOIDLE_PLL*.AUTO_* bit values */ |
282 | #define DPLL_AUTOIDLE_DISABLE 0x0 | |
283 | #define DPLL_AUTOIDLE_LOW_POWER_STOP 0x1 | |
284 | ||
285 | #define MAX_DPLL_WAIT_TRIES 1000000 | |
02e19a96 | 286 | |
4519c2bf PW |
287 | #define MIN_SDRC_DLL_LOCK_FREQ 83000000 |
288 | ||
c9812d04 PW |
289 | #define CYCLES_PER_MHZ 1000000 |
290 | ||
291 | /* Scale factor for fixed-point arith in omap3_core_dpll_m2_set_rate() */ | |
292 | #define SDRC_MPURATE_SCALE 8 | |
293 | ||
294 | /* 2^SDRC_MPURATE_BASE_SHIFT: MPU MHz that SDRC_MPURATE_LOOPS is defined for */ | |
295 | #define SDRC_MPURATE_BASE_SHIFT 9 | |
296 | ||
297 | /* | |
298 | * SDRC_MPURATE_LOOPS: Number of MPU loops to execute at | |
299 | * 2^MPURATE_BASE_SHIFT MHz for SDRC to stabilize | |
300 | */ | |
301 | #define SDRC_MPURATE_LOOPS 96 | |
302 | ||
02e19a96 PW |
303 | /** |
304 | * omap3_dpll_recalc - recalculate DPLL rate | |
305 | * @clk: DPLL struct clk | |
306 | * | |
307 | * Recalculate and propagate the DPLL rate. | |
308 | */ | |
8b9dbc16 | 309 | static unsigned long omap3_dpll_recalc(struct clk *clk) |
02e19a96 | 310 | { |
8b9dbc16 | 311 | return omap2_get_dpll_rate(clk); |
02e19a96 PW |
312 | } |
313 | ||
542313cc PW |
314 | /* _omap3_dpll_write_clken - write clken_bits arg to a DPLL's enable bits */ |
315 | static void _omap3_dpll_write_clken(struct clk *clk, u8 clken_bits) | |
316 | { | |
317 | const struct dpll_data *dd; | |
ad67ef68 | 318 | u32 v; |
542313cc PW |
319 | |
320 | dd = clk->dpll_data; | |
321 | ||
ad67ef68 PW |
322 | v = __raw_readl(dd->control_reg); |
323 | v &= ~dd->enable_mask; | |
324 | v |= clken_bits << __ffs(dd->enable_mask); | |
325 | __raw_writel(v, dd->control_reg); | |
542313cc PW |
326 | } |
327 | ||
328 | /* _omap3_wait_dpll_status: wait for a DPLL to enter a specific state */ | |
329 | static int _omap3_wait_dpll_status(struct clk *clk, u8 state) | |
330 | { | |
331 | const struct dpll_data *dd; | |
332 | int i = 0; | |
333 | int ret = -EINVAL; | |
542313cc PW |
334 | |
335 | dd = clk->dpll_data; | |
336 | ||
c1bd7aaf | 337 | state <<= __ffs(dd->idlest_mask); |
542313cc | 338 | |
c1bd7aaf | 339 | while (((__raw_readl(dd->idlest_reg) & dd->idlest_mask) != state) && |
542313cc PW |
340 | i < MAX_DPLL_WAIT_TRIES) { |
341 | i++; | |
342 | udelay(1); | |
343 | } | |
344 | ||
345 | if (i == MAX_DPLL_WAIT_TRIES) { | |
346 | printk(KERN_ERR "clock: %s failed transition to '%s'\n", | |
347 | clk->name, (state) ? "locked" : "bypassed"); | |
348 | } else { | |
349 | pr_debug("clock: %s transition to '%s' in %d loops\n", | |
350 | clk->name, (state) ? "locked" : "bypassed", i); | |
351 | ||
352 | ret = 0; | |
353 | } | |
354 | ||
355 | return ret; | |
356 | } | |
357 | ||
16c90f02 PW |
358 | /* From 3430 TRM ES2 4.7.6.2 */ |
359 | static u16 _omap3_dpll_compute_freqsel(struct clk *clk, u8 n) | |
360 | { | |
361 | unsigned long fint; | |
362 | u16 f = 0; | |
363 | ||
c0bf3132 | 364 | fint = clk->dpll_data->clk_ref->rate / (n + 1); |
16c90f02 PW |
365 | |
366 | pr_debug("clock: fint is %lu\n", fint); | |
367 | ||
368 | if (fint >= 750000 && fint <= 1000000) | |
369 | f = 0x3; | |
370 | else if (fint > 1000000 && fint <= 1250000) | |
371 | f = 0x4; | |
372 | else if (fint > 1250000 && fint <= 1500000) | |
373 | f = 0x5; | |
374 | else if (fint > 1500000 && fint <= 1750000) | |
375 | f = 0x6; | |
376 | else if (fint > 1750000 && fint <= 2100000) | |
377 | f = 0x7; | |
378 | else if (fint > 7500000 && fint <= 10000000) | |
379 | f = 0xB; | |
380 | else if (fint > 10000000 && fint <= 12500000) | |
381 | f = 0xC; | |
382 | else if (fint > 12500000 && fint <= 15000000) | |
383 | f = 0xD; | |
384 | else if (fint > 15000000 && fint <= 17500000) | |
385 | f = 0xE; | |
386 | else if (fint > 17500000 && fint <= 21000000) | |
387 | f = 0xF; | |
388 | else | |
389 | pr_debug("clock: unknown freqsel setting for %d\n", n); | |
390 | ||
391 | return f; | |
392 | } | |
393 | ||
542313cc PW |
394 | /* Non-CORE DPLL (e.g., DPLLs that do not control SDRC) clock functions */ |
395 | ||
396 | /* | |
397 | * _omap3_noncore_dpll_lock - instruct a DPLL to lock and wait for readiness | |
398 | * @clk: pointer to a DPLL struct clk | |
399 | * | |
400 | * Instructs a non-CORE DPLL to lock. Waits for the DPLL to report | |
401 | * readiness before returning. Will save and restore the DPLL's | |
402 | * autoidle state across the enable, per the CDP code. If the DPLL | |
403 | * locked successfully, return 0; if the DPLL did not lock in the time | |
404 | * allotted, or DPLL3 was passed in, return -EINVAL. | |
405 | */ | |
406 | static int _omap3_noncore_dpll_lock(struct clk *clk) | |
407 | { | |
408 | u8 ai; | |
409 | int r; | |
410 | ||
411 | if (clk == &dpll3_ck) | |
412 | return -EINVAL; | |
413 | ||
414 | pr_debug("clock: locking DPLL %s\n", clk->name); | |
415 | ||
416 | ai = omap3_dpll_autoidle_read(clk); | |
417 | ||
416db864 PW |
418 | omap3_dpll_deny_idle(clk); |
419 | ||
542313cc PW |
420 | _omap3_dpll_write_clken(clk, DPLL_LOCKED); |
421 | ||
416db864 PW |
422 | r = _omap3_wait_dpll_status(clk, 1); |
423 | ||
424 | if (ai) | |
542313cc | 425 | omap3_dpll_allow_idle(clk); |
542313cc PW |
426 | |
427 | return r; | |
428 | } | |
429 | ||
430 | /* | |
c0bf3132 | 431 | * _omap3_noncore_dpll_bypass - instruct a DPLL to bypass and wait for readiness |
542313cc PW |
432 | * @clk: pointer to a DPLL struct clk |
433 | * | |
434 | * Instructs a non-CORE DPLL to enter low-power bypass mode. In | |
435 | * bypass mode, the DPLL's rate is set equal to its parent clock's | |
436 | * rate. Waits for the DPLL to report readiness before returning. | |
437 | * Will save and restore the DPLL's autoidle state across the enable, | |
438 | * per the CDP code. If the DPLL entered bypass mode successfully, | |
439 | * return 0; if the DPLL did not enter bypass in the time allotted, or | |
440 | * DPLL3 was passed in, or the DPLL does not support low-power bypass, | |
441 | * return -EINVAL. | |
442 | */ | |
443 | static int _omap3_noncore_dpll_bypass(struct clk *clk) | |
444 | { | |
445 | int r; | |
446 | u8 ai; | |
447 | ||
448 | if (clk == &dpll3_ck) | |
449 | return -EINVAL; | |
450 | ||
451 | if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS))) | |
452 | return -EINVAL; | |
453 | ||
454 | pr_debug("clock: configuring DPLL %s for low-power bypass\n", | |
455 | clk->name); | |
456 | ||
457 | ai = omap3_dpll_autoidle_read(clk); | |
458 | ||
459 | _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_BYPASS); | |
460 | ||
461 | r = _omap3_wait_dpll_status(clk, 0); | |
462 | ||
463 | if (ai) | |
464 | omap3_dpll_allow_idle(clk); | |
465 | else | |
466 | omap3_dpll_deny_idle(clk); | |
467 | ||
468 | return r; | |
469 | } | |
470 | ||
471 | /* | |
472 | * _omap3_noncore_dpll_stop - instruct a DPLL to stop | |
473 | * @clk: pointer to a DPLL struct clk | |
474 | * | |
475 | * Instructs a non-CORE DPLL to enter low-power stop. Will save and | |
476 | * restore the DPLL's autoidle state across the stop, per the CDP | |
477 | * code. If DPLL3 was passed in, or the DPLL does not support | |
478 | * low-power stop, return -EINVAL; otherwise, return 0. | |
479 | */ | |
480 | static int _omap3_noncore_dpll_stop(struct clk *clk) | |
481 | { | |
482 | u8 ai; | |
483 | ||
484 | if (clk == &dpll3_ck) | |
485 | return -EINVAL; | |
486 | ||
487 | if (!(clk->dpll_data->modes & (1 << DPLL_LOW_POWER_STOP))) | |
488 | return -EINVAL; | |
489 | ||
490 | pr_debug("clock: stopping DPLL %s\n", clk->name); | |
491 | ||
492 | ai = omap3_dpll_autoidle_read(clk); | |
493 | ||
494 | _omap3_dpll_write_clken(clk, DPLL_LOW_POWER_STOP); | |
495 | ||
496 | if (ai) | |
497 | omap3_dpll_allow_idle(clk); | |
498 | else | |
499 | omap3_dpll_deny_idle(clk); | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | /** | |
505 | * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode | |
506 | * @clk: pointer to a DPLL struct clk | |
507 | * | |
508 | * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock. | |
509 | * The choice of modes depends on the DPLL's programmed rate: if it is | |
510 | * the same as the DPLL's parent clock, it will enter bypass; | |
511 | * otherwise, it will enter lock. This code will wait for the DPLL to | |
512 | * indicate readiness before returning, unless the DPLL takes too long | |
513 | * to enter the target state. Intended to be used as the struct clk's | |
514 | * enable function. If DPLL3 was passed in, or the DPLL does not | |
515 | * support low-power stop, or if the DPLL took too long to enter | |
516 | * bypass or lock, return -EINVAL; otherwise, return 0. | |
517 | */ | |
518 | static int omap3_noncore_dpll_enable(struct clk *clk) | |
519 | { | |
520 | int r; | |
c0bf3132 | 521 | struct dpll_data *dd; |
542313cc PW |
522 | |
523 | if (clk == &dpll3_ck) | |
524 | return -EINVAL; | |
525 | ||
c0bf3132 RK |
526 | dd = clk->dpll_data; |
527 | if (!dd) | |
528 | return -EINVAL; | |
529 | ||
530 | if (clk->rate == dd->clk_bypass->rate) { | |
531 | WARN_ON(clk->parent != dd->clk_bypass); | |
542313cc | 532 | r = _omap3_noncore_dpll_bypass(clk); |
c0bf3132 RK |
533 | } else { |
534 | WARN_ON(clk->parent != dd->clk_ref); | |
542313cc | 535 | r = _omap3_noncore_dpll_lock(clk); |
c0bf3132 RK |
536 | } |
537 | /* FIXME: this is dubious - if clk->rate has changed, what about propagating? */ | |
538 | if (!r) | |
539 | clk->rate = omap2_get_dpll_rate(clk); | |
542313cc PW |
540 | |
541 | return r; | |
542 | } | |
543 | ||
544 | /** | |
545 | * omap3_noncore_dpll_enable - instruct a DPLL to enter bypass or lock mode | |
546 | * @clk: pointer to a DPLL struct clk | |
547 | * | |
548 | * Instructs a non-CORE DPLL to enable, e.g., to enter bypass or lock. | |
549 | * The choice of modes depends on the DPLL's programmed rate: if it is | |
550 | * the same as the DPLL's parent clock, it will enter bypass; | |
551 | * otherwise, it will enter lock. This code will wait for the DPLL to | |
552 | * indicate readiness before returning, unless the DPLL takes too long | |
553 | * to enter the target state. Intended to be used as the struct clk's | |
554 | * enable function. If DPLL3 was passed in, or the DPLL does not | |
555 | * support low-power stop, or if the DPLL took too long to enter | |
556 | * bypass or lock, return -EINVAL; otherwise, return 0. | |
557 | */ | |
558 | static void omap3_noncore_dpll_disable(struct clk *clk) | |
559 | { | |
560 | if (clk == &dpll3_ck) | |
561 | return; | |
562 | ||
563 | _omap3_noncore_dpll_stop(clk); | |
564 | } | |
565 | ||
16c90f02 PW |
566 | |
567 | /* Non-CORE DPLL rate set code */ | |
568 | ||
569 | /* | |
570 | * omap3_noncore_dpll_program - set non-core DPLL M,N values directly | |
571 | * @clk: struct clk * of DPLL to set | |
572 | * @m: DPLL multiplier to set | |
573 | * @n: DPLL divider to set | |
574 | * @freqsel: FREQSEL value to set | |
575 | * | |
576 | * Program the DPLL with the supplied M, N values, and wait for the DPLL to | |
577 | * lock.. Returns -EINVAL upon error, or 0 upon success. | |
578 | */ | |
579 | static int omap3_noncore_dpll_program(struct clk *clk, u16 m, u8 n, u16 freqsel) | |
580 | { | |
581 | struct dpll_data *dd = clk->dpll_data; | |
582 | u32 v; | |
583 | ||
584 | /* 3430 ES2 TRM: 4.7.6.9 DPLL Programming Sequence */ | |
585 | _omap3_noncore_dpll_bypass(clk); | |
586 | ||
f0587b63 PW |
587 | /* Set jitter correction */ |
588 | v = __raw_readl(dd->control_reg); | |
589 | v &= ~dd->freqsel_mask; | |
590 | v |= freqsel << __ffs(dd->freqsel_mask); | |
591 | __raw_writel(v, dd->control_reg); | |
592 | ||
593 | /* Set DPLL multiplier, divider */ | |
16c90f02 PW |
594 | v = __raw_readl(dd->mult_div1_reg); |
595 | v &= ~(dd->mult_mask | dd->div1_mask); | |
16c90f02 | 596 | v |= m << __ffs(dd->mult_mask); |
f0587b63 | 597 | v |= (n - 1) << __ffs(dd->div1_mask); |
16c90f02 PW |
598 | __raw_writel(v, dd->mult_div1_reg); |
599 | ||
600 | /* We let the clock framework set the other output dividers later */ | |
601 | ||
602 | /* REVISIT: Set ramp-up delay? */ | |
603 | ||
604 | _omap3_noncore_dpll_lock(clk); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
609 | /** | |
610 | * omap3_noncore_dpll_set_rate - set non-core DPLL rate | |
611 | * @clk: struct clk * of DPLL to set | |
612 | * @rate: rounded target rate | |
613 | * | |
c0bf3132 RK |
614 | * Set the DPLL CLKOUT to the target rate. If the DPLL can enter |
615 | * low-power bypass, and the target rate is the bypass source clock | |
616 | * rate, then configure the DPLL for bypass. Otherwise, round the | |
617 | * target rate if it hasn't been done already, then program and lock | |
618 | * the DPLL. Returns -EINVAL upon error, or 0 upon success. | |
16c90f02 PW |
619 | */ |
620 | static int omap3_noncore_dpll_set_rate(struct clk *clk, unsigned long rate) | |
621 | { | |
c0bf3132 | 622 | struct clk *new_parent = NULL; |
16c90f02 PW |
623 | u16 freqsel; |
624 | struct dpll_data *dd; | |
c0bf3132 | 625 | int ret; |
16c90f02 PW |
626 | |
627 | if (!clk || !rate) | |
628 | return -EINVAL; | |
629 | ||
630 | dd = clk->dpll_data; | |
631 | if (!dd) | |
632 | return -EINVAL; | |
633 | ||
634 | if (rate == omap2_get_dpll_rate(clk)) | |
635 | return 0; | |
636 | ||
c0bf3132 RK |
637 | /* |
638 | * Ensure both the bypass and ref clocks are enabled prior to | |
639 | * doing anything; we need the bypass clock running to reprogram | |
640 | * the DPLL. | |
641 | */ | |
642 | omap2_clk_enable(dd->clk_bypass); | |
643 | omap2_clk_enable(dd->clk_ref); | |
16c90f02 | 644 | |
c0bf3132 RK |
645 | if (dd->clk_bypass->rate == rate && |
646 | (clk->dpll_data->modes & (1 << DPLL_LOW_POWER_BYPASS))) { | |
647 | pr_debug("clock: %s: set rate: entering bypass.\n", clk->name); | |
648 | ||
649 | ret = _omap3_noncore_dpll_bypass(clk); | |
650 | if (!ret) | |
651 | new_parent = dd->clk_bypass; | |
652 | } else { | |
653 | if (dd->last_rounded_rate != rate) | |
654 | omap2_dpll_round_rate(clk, rate); | |
16c90f02 | 655 | |
c0bf3132 RK |
656 | if (dd->last_rounded_rate == 0) |
657 | return -EINVAL; | |
16c90f02 | 658 | |
c0bf3132 RK |
659 | freqsel = _omap3_dpll_compute_freqsel(clk, dd->last_rounded_n); |
660 | if (!freqsel) | |
661 | WARN_ON(1); | |
662 | ||
663 | pr_debug("clock: %s: set rate: locking rate to %lu.\n", | |
664 | clk->name, rate); | |
665 | ||
666 | ret = omap3_noncore_dpll_program(clk, dd->last_rounded_m, | |
667 | dd->last_rounded_n, freqsel); | |
668 | if (!ret) | |
669 | new_parent = dd->clk_ref; | |
670 | } | |
671 | if (!ret) { | |
672 | /* | |
673 | * Switch the parent clock in the heirarchy, and make sure | |
674 | * that the new parent's usecount is correct. Note: we | |
675 | * enable the new parent before disabling the old to avoid | |
676 | * any unnecessary hardware disable->enable transitions. | |
677 | */ | |
678 | if (clk->usecount) { | |
679 | omap2_clk_enable(new_parent); | |
680 | omap2_clk_disable(clk->parent); | |
681 | } | |
682 | clk_reparent(clk, new_parent); | |
683 | clk->rate = rate; | |
684 | } | |
685 | omap2_clk_disable(dd->clk_ref); | |
686 | omap2_clk_disable(dd->clk_bypass); | |
16c90f02 | 687 | |
16c90f02 PW |
688 | return 0; |
689 | } | |
690 | ||
691 | static int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate) | |
692 | { | |
693 | /* | |
694 | * According to the 12-5 CDP code from TI, "Limitation 2.5" | |
695 | * on 3430ES1 prevents us from changing DPLL multipliers or dividers | |
696 | * on DPLL4. | |
697 | */ | |
698 | if (omap_rev() == OMAP3430_REV_ES1_0) { | |
699 | printk(KERN_ERR "clock: DPLL4 cannot change rate due to " | |
700 | "silicon 'Limitation 2.5' on 3430ES1.\n"); | |
701 | return -EINVAL; | |
702 | } | |
703 | return omap3_noncore_dpll_set_rate(clk, rate); | |
704 | } | |
705 | ||
0eafd472 PW |
706 | |
707 | /* | |
708 | * CORE DPLL (DPLL3) rate programming functions | |
709 | * | |
710 | * These call into SRAM code to do the actual CM writes, since the SDRAM | |
711 | * is clocked from DPLL3. | |
712 | */ | |
713 | ||
714 | /** | |
715 | * omap3_core_dpll_m2_set_rate - set CORE DPLL M2 divider | |
716 | * @clk: struct clk * of DPLL to set | |
717 | * @rate: rounded target rate | |
718 | * | |
719 | * Program the DPLL M2 divider with the rounded target rate. Returns | |
720 | * -EINVAL upon error, or 0 upon success. | |
721 | */ | |
722 | static int omap3_core_dpll_m2_set_rate(struct clk *clk, unsigned long rate) | |
723 | { | |
724 | u32 new_div = 0; | |
4519c2bf | 725 | u32 unlock_dll = 0; |
c9812d04 PW |
726 | u32 c; |
727 | unsigned long validrate, sdrcrate, mpurate; | |
0eafd472 PW |
728 | struct omap_sdrc_params *sp; |
729 | ||
730 | if (!clk || !rate) | |
731 | return -EINVAL; | |
732 | ||
733 | if (clk != &dpll3_m2_ck) | |
734 | return -EINVAL; | |
735 | ||
0eafd472 PW |
736 | validrate = omap2_clksel_round_rate_div(clk, rate, &new_div); |
737 | if (validrate != rate) | |
738 | return -EINVAL; | |
739 | ||
740 | sdrcrate = sdrc_ick.rate; | |
741 | if (rate > clk->rate) | |
3afec633 | 742 | sdrcrate <<= ((rate / clk->rate) >> 1); |
0eafd472 | 743 | else |
3afec633 | 744 | sdrcrate >>= ((clk->rate / rate) >> 1); |
0eafd472 PW |
745 | |
746 | sp = omap2_sdrc_get_params(sdrcrate); | |
747 | if (!sp) | |
748 | return -EINVAL; | |
749 | ||
4519c2bf PW |
750 | if (sdrcrate < MIN_SDRC_DLL_LOCK_FREQ) { |
751 | pr_debug("clock: will unlock SDRC DLL\n"); | |
752 | unlock_dll = 1; | |
753 | } | |
754 | ||
c9812d04 PW |
755 | /* |
756 | * XXX This only needs to be done when the CPU frequency changes | |
757 | */ | |
758 | mpurate = arm_fck.rate / CYCLES_PER_MHZ; | |
759 | c = (mpurate << SDRC_MPURATE_SCALE) >> SDRC_MPURATE_BASE_SHIFT; | |
760 | c += 1; /* for safety */ | |
761 | c *= SDRC_MPURATE_LOOPS; | |
762 | c >>= SDRC_MPURATE_SCALE; | |
763 | if (c == 0) | |
764 | c = 1; | |
765 | ||
b7aee4bf PW |
766 | pr_debug("clock: changing CORE DPLL rate from %lu to %lu\n", clk->rate, |
767 | validrate); | |
768 | pr_debug("clock: SDRC timing params used: %08x %08x %08x\n", | |
769 | sp->rfr_ctrl, sp->actim_ctrla, sp->actim_ctrlb); | |
0eafd472 | 770 | |
0eafd472 | 771 | omap3_configure_core_dpll(sp->rfr_ctrl, sp->actim_ctrla, |
d0ba3922 | 772 | sp->actim_ctrlb, new_div, unlock_dll, c, |
3afec633 | 773 | sp->mr, rate > clk->rate); |
0eafd472 | 774 | |
0eafd472 PW |
775 | return 0; |
776 | } | |
777 | ||
778 | ||
548d8495 RK |
779 | static const struct clkops clkops_noncore_dpll_ops = { |
780 | .enable = &omap3_noncore_dpll_enable, | |
781 | .disable = &omap3_noncore_dpll_disable, | |
782 | }; | |
783 | ||
16c90f02 PW |
784 | /* DPLL autoidle read/set code */ |
785 | ||
786 | ||
542313cc PW |
787 | /** |
788 | * omap3_dpll_autoidle_read - read a DPLL's autoidle bits | |
789 | * @clk: struct clk * of the DPLL to read | |
790 | * | |
791 | * Return the DPLL's autoidle bits, shifted down to bit 0. Returns | |
792 | * -EINVAL if passed a null pointer or if the struct clk does not | |
793 | * appear to refer to a DPLL. | |
794 | */ | |
795 | static u32 omap3_dpll_autoidle_read(struct clk *clk) | |
796 | { | |
797 | const struct dpll_data *dd; | |
798 | u32 v; | |
799 | ||
800 | if (!clk || !clk->dpll_data) | |
801 | return -EINVAL; | |
802 | ||
803 | dd = clk->dpll_data; | |
804 | ||
ad67ef68 | 805 | v = __raw_readl(dd->autoidle_reg); |
542313cc PW |
806 | v &= dd->autoidle_mask; |
807 | v >>= __ffs(dd->autoidle_mask); | |
808 | ||
809 | return v; | |
810 | } | |
811 | ||
812 | /** | |
813 | * omap3_dpll_allow_idle - enable DPLL autoidle bits | |
814 | * @clk: struct clk * of the DPLL to operate on | |
815 | * | |
816 | * Enable DPLL automatic idle control. This automatic idle mode | |
817 | * switching takes effect only when the DPLL is locked, at least on | |
818 | * OMAP3430. The DPLL will enter low-power stop when its downstream | |
819 | * clocks are gated. No return value. | |
820 | */ | |
821 | static void omap3_dpll_allow_idle(struct clk *clk) | |
822 | { | |
823 | const struct dpll_data *dd; | |
ad67ef68 | 824 | u32 v; |
542313cc PW |
825 | |
826 | if (!clk || !clk->dpll_data) | |
827 | return; | |
828 | ||
829 | dd = clk->dpll_data; | |
830 | ||
831 | /* | |
832 | * REVISIT: CORE DPLL can optionally enter low-power bypass | |
833 | * by writing 0x5 instead of 0x1. Add some mechanism to | |
834 | * optionally enter this mode. | |
835 | */ | |
ad67ef68 PW |
836 | v = __raw_readl(dd->autoidle_reg); |
837 | v &= ~dd->autoidle_mask; | |
838 | v |= DPLL_AUTOIDLE_LOW_POWER_STOP << __ffs(dd->autoidle_mask); | |
839 | __raw_writel(v, dd->autoidle_reg); | |
542313cc PW |
840 | } |
841 | ||
842 | /** | |
843 | * omap3_dpll_deny_idle - prevent DPLL from automatically idling | |
844 | * @clk: struct clk * of the DPLL to operate on | |
845 | * | |
846 | * Disable DPLL automatic idle control. No return value. | |
847 | */ | |
848 | static void omap3_dpll_deny_idle(struct clk *clk) | |
849 | { | |
850 | const struct dpll_data *dd; | |
ad67ef68 | 851 | u32 v; |
542313cc PW |
852 | |
853 | if (!clk || !clk->dpll_data) | |
854 | return; | |
855 | ||
856 | dd = clk->dpll_data; | |
857 | ||
ad67ef68 PW |
858 | v = __raw_readl(dd->autoidle_reg); |
859 | v &= ~dd->autoidle_mask; | |
860 | v |= DPLL_AUTOIDLE_DISABLE << __ffs(dd->autoidle_mask); | |
861 | __raw_writel(v, dd->autoidle_reg); | |
542313cc PW |
862 | } |
863 | ||
864 | /* Clock control for DPLL outputs */ | |
865 | ||
02e19a96 PW |
866 | /** |
867 | * omap3_clkoutx2_recalc - recalculate DPLL X2 output virtual clock rate | |
868 | * @clk: DPLL output struct clk | |
869 | * | |
870 | * Using parent clock DPLL data, look up DPLL state. If locked, set our | |
871 | * rate to the dpll_clk * 2; otherwise, just use dpll_clk. | |
872 | */ | |
8b9dbc16 | 873 | static unsigned long omap3_clkoutx2_recalc(struct clk *clk) |
02e19a96 PW |
874 | { |
875 | const struct dpll_data *dd; | |
8b9dbc16 | 876 | unsigned long rate; |
02e19a96 PW |
877 | u32 v; |
878 | struct clk *pclk; | |
879 | ||
880 | /* Walk up the parents of clk, looking for a DPLL */ | |
881 | pclk = clk->parent; | |
882 | while (pclk && !pclk->dpll_data) | |
883 | pclk = pclk->parent; | |
884 | ||
885 | /* clk does not have a DPLL as a parent? */ | |
886 | WARN_ON(!pclk); | |
887 | ||
888 | dd = pclk->dpll_data; | |
889 | ||
c0bf3132 | 890 | WARN_ON(!dd->enable_mask); |
02e19a96 PW |
891 | |
892 | v = __raw_readl(dd->control_reg) & dd->enable_mask; | |
893 | v >>= __ffs(dd->enable_mask); | |
c0bf3132 | 894 | if (v != OMAP3XXX_EN_DPLL_LOCKED) |
8b9dbc16 | 895 | rate = clk->parent->rate; |
02e19a96 | 896 | else |
8b9dbc16 RK |
897 | rate = clk->parent->rate * 2; |
898 | return rate; | |
02e19a96 PW |
899 | } |
900 | ||
542313cc PW |
901 | /* Common clock code */ |
902 | ||
02e19a96 PW |
903 | /* |
904 | * As it is structured now, this will prevent an OMAP2/3 multiboot | |
905 | * kernel from compiling. This will need further attention. | |
906 | */ | |
907 | #if defined(CONFIG_ARCH_OMAP3) | |
908 | ||
909 | static struct clk_functions omap2_clk_functions = { | |
910 | .clk_enable = omap2_clk_enable, | |
911 | .clk_disable = omap2_clk_disable, | |
912 | .clk_round_rate = omap2_clk_round_rate, | |
913 | .clk_set_rate = omap2_clk_set_rate, | |
914 | .clk_set_parent = omap2_clk_set_parent, | |
915 | .clk_disable_unused = omap2_clk_disable_unused, | |
916 | }; | |
917 | ||
918 | /* | |
919 | * Set clocks for bypass mode for reboot to work. | |
920 | */ | |
921 | void omap2_clk_prepare_for_reboot(void) | |
922 | { | |
923 | /* REVISIT: Not ready for 343x */ | |
924 | #if 0 | |
925 | u32 rate; | |
926 | ||
927 | if (vclk == NULL || sclk == NULL) | |
928 | return; | |
929 | ||
930 | rate = clk_get_rate(sclk); | |
931 | clk_set_rate(vclk, rate); | |
932 | #endif | |
933 | } | |
934 | ||
935 | /* REVISIT: Move this init stuff out into clock.c */ | |
936 | ||
937 | /* | |
938 | * Switch the MPU rate if specified on cmdline. | |
939 | * We cannot do this early until cmdline is parsed. | |
940 | */ | |
941 | static int __init omap2_clk_arch_init(void) | |
942 | { | |
943 | if (!mpurate) | |
944 | return -EINVAL; | |
945 | ||
946 | /* REVISIT: not yet ready for 343x */ | |
947 | #if 0 | |
7b0f89d7 | 948 | if (clk_set_rate(&virt_prcm_set, mpurate)) |
02e19a96 PW |
949 | printk(KERN_ERR "Could not find matching MPU rate\n"); |
950 | #endif | |
951 | ||
952 | recalculate_root_clocks(); | |
953 | ||
954 | printk(KERN_INFO "Switched to new clocking rate (Crystal/DPLL3/MPU): " | |
955 | "%ld.%01ld/%ld/%ld MHz\n", | |
956 | (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10, | |
957 | (core_ck.rate / 1000000), (dpll1_fck.rate / 1000000)) ; | |
958 | ||
959 | return 0; | |
960 | } | |
961 | arch_initcall(omap2_clk_arch_init); | |
962 | ||
963 | int __init omap2_clk_init(void) | |
964 | { | |
965 | /* struct prcm_config *prcm; */ | |
44dc9d02 | 966 | struct omap_clk *c; |
02e19a96 PW |
967 | /* u32 clkrate; */ |
968 | u32 cpu_clkflg; | |
969 | ||
02e19a96 PW |
970 | if (cpu_is_omap34xx()) { |
971 | cpu_mask = RATE_IN_343X; | |
44dc9d02 | 972 | cpu_clkflg = CK_343X; |
02e19a96 PW |
973 | |
974 | /* | |
975 | * Update this if there are further clock changes between ES2 | |
976 | * and production parts | |
977 | */ | |
84a34344 | 978 | if (omap_rev() == OMAP3430_REV_ES1_0) { |
02e19a96 | 979 | /* No 3430ES1-only rates exist, so no RATE_IN_3430ES1 */ |
44dc9d02 | 980 | cpu_clkflg |= CK_3430ES1; |
02e19a96 PW |
981 | } else { |
982 | cpu_mask |= RATE_IN_3430ES2; | |
44dc9d02 | 983 | cpu_clkflg |= CK_3430ES2; |
02e19a96 PW |
984 | } |
985 | } | |
986 | ||
987 | clk_init(&omap2_clk_functions); | |
988 | ||
3f0a820c | 989 | for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++) |
79716870 | 990 | clk_preinit(c->lk.clk); |
3f0a820c | 991 | |
44dc9d02 RK |
992 | for (c = omap34xx_clks; c < omap34xx_clks + ARRAY_SIZE(omap34xx_clks); c++) |
993 | if (c->cpu & cpu_clkflg) { | |
994 | clkdev_add(&c->lk); | |
995 | clk_register(c->lk.clk); | |
996 | omap2_init_clk_clkdm(c->lk.clk); | |
333943ba | 997 | } |
02e19a96 PW |
998 | |
999 | /* REVISIT: Not yet ready for OMAP3 */ | |
1000 | #if 0 | |
1001 | /* Check the MPU rate set by bootloader */ | |
1002 | clkrate = omap2_get_dpll_rate_24xx(&dpll_ck); | |
1003 | for (prcm = rate_table; prcm->mpu_speed; prcm++) { | |
1004 | if (!(prcm->flags & cpu_mask)) | |
1005 | continue; | |
1006 | if (prcm->xtal_speed != sys_ck.rate) | |
1007 | continue; | |
1008 | if (prcm->dpll_speed <= clkrate) | |
1009 | break; | |
1010 | } | |
1011 | curr_prcm_set = prcm; | |
1012 | #endif | |
1013 | ||
1014 | recalculate_root_clocks(); | |
1015 | ||
3760d31f | 1016 | printk(KERN_INFO "Clocking rate (Crystal/DPLL/ARM core): " |
02e19a96 PW |
1017 | "%ld.%01ld/%ld/%ld MHz\n", |
1018 | (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10, | |
3760d31f | 1019 | (core_ck.rate / 1000000), (arm_fck.rate / 1000000)); |
02e19a96 PW |
1020 | |
1021 | /* | |
1022 | * Only enable those clocks we will need, let the drivers | |
1023 | * enable other clocks as necessary | |
1024 | */ | |
1025 | clk_enable_init_clocks(); | |
1026 | ||
1027 | /* Avoid sleeping during omap2_clk_prepare_for_reboot() */ | |
1028 | /* REVISIT: not yet ready for 343x */ | |
1029 | #if 0 | |
1030 | vclk = clk_get(NULL, "virt_prcm_set"); | |
1031 | sclk = clk_get(NULL, "sys_ck"); | |
1032 | #endif | |
1033 | return 0; | |
1034 | } | |
1035 | ||
1036 | #endif |