Commit | Line | Data |
---|---|---|
046d6b28 TL |
1 | /* |
2 | * linux/arch/arm/mach-omap2/clock.c | |
3 | * | |
a16e9703 TL |
4 | * Copyright (C) 2005-2008 Texas Instruments, Inc. |
5 | * Copyright (C) 2004-2008 Nokia Corporation | |
046d6b28 | 6 | * |
a16e9703 TL |
7 | * Contacts: |
8 | * Richard Woodruff <r-woodruff2@ti.com> | |
9 | * Paul Walmsley | |
046d6b28 | 10 | * |
a16e9703 TL |
11 | * Based on earlier work by Tuukka Tikkanen, Tony Lindgren, |
12 | * Gordon McNutt and RidgeRun, Inc. | |
046d6b28 TL |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | */ | |
6b8858a9 PW |
18 | #undef DEBUG |
19 | ||
046d6b28 TL |
20 | #include <linux/module.h> |
21 | #include <linux/kernel.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/delay.h> | |
f8ce2547 | 26 | #include <linux/clk.h> |
6b8858a9 PW |
27 | #include <linux/io.h> |
28 | #include <linux/cpufreq.h> | |
fbd3bdb2 | 29 | #include <linux/bitops.h> |
046d6b28 | 30 | |
a09e64fb RK |
31 | #include <mach/clock.h> |
32 | #include <mach/sram.h> | |
76631486 | 33 | #include <asm/div64.h> |
8ad8ff65 | 34 | #include <asm/clkdev.h> |
046d6b28 | 35 | |
f8de9b2c | 36 | #include <mach/sdrc.h> |
6b8858a9 | 37 | #include "clock.h" |
6b8858a9 PW |
38 | #include "prm.h" |
39 | #include "prm-regbits-24xx.h" | |
40 | #include "cm.h" | |
41 | #include "cm-regbits-24xx.h" | |
046d6b28 | 42 | |
548d8495 RK |
43 | static const struct clkops clkops_oscck; |
44 | static const struct clkops clkops_fixed; | |
45 | ||
46 | #include "clock24xx.h" | |
47 | ||
8ad8ff65 RK |
48 | struct omap_clk { |
49 | u32 cpu; | |
50 | struct clk_lookup lk; | |
51 | }; | |
52 | ||
53 | #define CLK(dev, con, ck, cp) \ | |
54 | { \ | |
55 | .cpu = cp, \ | |
56 | .lk = { \ | |
57 | .dev_id = dev, \ | |
58 | .con_id = con, \ | |
59 | .clk = ck, \ | |
60 | }, \ | |
61 | } | |
62 | ||
15ca78f7 PW |
63 | #define CK_243X RATE_IN_243X |
64 | #define CK_242X RATE_IN_242X | |
8ad8ff65 RK |
65 | |
66 | static struct omap_clk omap24xx_clks[] = { | |
67 | /* external root sources */ | |
68 | CLK(NULL, "func_32k_ck", &func_32k_ck, CK_243X | CK_242X), | |
f248076c | 69 | CLK(NULL, "secure_32k_ck", &secure_32k_ck, CK_243X | CK_242X), |
8ad8ff65 RK |
70 | CLK(NULL, "osc_ck", &osc_ck, CK_243X | CK_242X), |
71 | CLK(NULL, "sys_ck", &sys_ck, CK_243X | CK_242X), | |
72 | CLK(NULL, "alt_ck", &alt_ck, CK_243X | CK_242X), | |
73 | /* internal analog sources */ | |
74 | CLK(NULL, "dpll_ck", &dpll_ck, CK_243X | CK_242X), | |
75 | CLK(NULL, "apll96_ck", &apll96_ck, CK_243X | CK_242X), | |
76 | CLK(NULL, "apll54_ck", &apll54_ck, CK_243X | CK_242X), | |
77 | /* internal prcm root sources */ | |
78 | CLK(NULL, "func_54m_ck", &func_54m_ck, CK_243X | CK_242X), | |
79 | CLK(NULL, "core_ck", &core_ck, CK_243X | CK_242X), | |
80 | CLK(NULL, "func_96m_ck", &func_96m_ck, CK_243X | CK_242X), | |
81 | CLK(NULL, "func_48m_ck", &func_48m_ck, CK_243X | CK_242X), | |
82 | CLK(NULL, "func_12m_ck", &func_12m_ck, CK_243X | CK_242X), | |
83 | CLK(NULL, "ck_wdt1_osc", &wdt1_osc_ck, CK_243X | CK_242X), | |
84 | CLK(NULL, "sys_clkout_src", &sys_clkout_src, CK_243X | CK_242X), | |
85 | CLK(NULL, "sys_clkout", &sys_clkout, CK_243X | CK_242X), | |
86 | CLK(NULL, "sys_clkout2_src", &sys_clkout2_src, CK_242X), | |
87 | CLK(NULL, "sys_clkout2", &sys_clkout2, CK_242X), | |
88 | CLK(NULL, "emul_ck", &emul_ck, CK_242X), | |
89 | /* mpu domain clocks */ | |
90 | CLK(NULL, "mpu_ck", &mpu_ck, CK_243X | CK_242X), | |
91 | /* dsp domain clocks */ | |
92 | CLK(NULL, "dsp_fck", &dsp_fck, CK_243X | CK_242X), | |
93 | CLK(NULL, "dsp_irate_ick", &dsp_irate_ick, CK_243X | CK_242X), | |
94 | CLK(NULL, "dsp_ick", &dsp_ick, CK_242X), | |
95 | CLK(NULL, "iva2_1_ick", &iva2_1_ick, CK_243X), | |
96 | CLK(NULL, "iva1_ifck", &iva1_ifck, CK_242X), | |
97 | CLK(NULL, "iva1_mpu_int_ifck", &iva1_mpu_int_ifck, CK_242X), | |
98 | /* GFX domain clocks */ | |
99 | CLK(NULL, "gfx_3d_fck", &gfx_3d_fck, CK_243X | CK_242X), | |
100 | CLK(NULL, "gfx_2d_fck", &gfx_2d_fck, CK_243X | CK_242X), | |
101 | CLK(NULL, "gfx_ick", &gfx_ick, CK_243X | CK_242X), | |
102 | /* Modem domain clocks */ | |
103 | CLK(NULL, "mdm_ick", &mdm_ick, CK_243X), | |
104 | CLK(NULL, "mdm_osc_ck", &mdm_osc_ck, CK_243X), | |
105 | /* DSS domain clocks */ | |
005187ee TL |
106 | CLK("omapfb", "ick", &dss_ick, CK_243X | CK_242X), |
107 | CLK("omapfb", "dss1_fck", &dss1_fck, CK_243X | CK_242X), | |
108 | CLK("omapfb", "dss2_fck", &dss2_fck, CK_243X | CK_242X), | |
109 | CLK("omapfb", "tv_fck", &dss_54m_fck, CK_243X | CK_242X), | |
8ad8ff65 RK |
110 | /* L3 domain clocks */ |
111 | CLK(NULL, "core_l3_ck", &core_l3_ck, CK_243X | CK_242X), | |
112 | CLK(NULL, "ssi_fck", &ssi_ssr_sst_fck, CK_243X | CK_242X), | |
113 | CLK(NULL, "usb_l4_ick", &usb_l4_ick, CK_243X | CK_242X), | |
114 | /* L4 domain clocks */ | |
115 | CLK(NULL, "l4_ck", &l4_ck, CK_243X | CK_242X), | |
9299fd85 | 116 | CLK(NULL, "ssi_l4_ick", &ssi_l4_ick, CK_243X | CK_242X), |
8ad8ff65 RK |
117 | /* virtual meta-group clock */ |
118 | CLK(NULL, "virt_prcm_set", &virt_prcm_set, CK_243X | CK_242X), | |
119 | /* general l4 interface ck, multi-parent functional clk */ | |
120 | CLK(NULL, "gpt1_ick", &gpt1_ick, CK_243X | CK_242X), | |
121 | CLK(NULL, "gpt1_fck", &gpt1_fck, CK_243X | CK_242X), | |
122 | CLK(NULL, "gpt2_ick", &gpt2_ick, CK_243X | CK_242X), | |
123 | CLK(NULL, "gpt2_fck", &gpt2_fck, CK_243X | CK_242X), | |
124 | CLK(NULL, "gpt3_ick", &gpt3_ick, CK_243X | CK_242X), | |
125 | CLK(NULL, "gpt3_fck", &gpt3_fck, CK_243X | CK_242X), | |
126 | CLK(NULL, "gpt4_ick", &gpt4_ick, CK_243X | CK_242X), | |
127 | CLK(NULL, "gpt4_fck", &gpt4_fck, CK_243X | CK_242X), | |
128 | CLK(NULL, "gpt5_ick", &gpt5_ick, CK_243X | CK_242X), | |
129 | CLK(NULL, "gpt5_fck", &gpt5_fck, CK_243X | CK_242X), | |
130 | CLK(NULL, "gpt6_ick", &gpt6_ick, CK_243X | CK_242X), | |
131 | CLK(NULL, "gpt6_fck", &gpt6_fck, CK_243X | CK_242X), | |
132 | CLK(NULL, "gpt7_ick", &gpt7_ick, CK_243X | CK_242X), | |
133 | CLK(NULL, "gpt7_fck", &gpt7_fck, CK_243X | CK_242X), | |
134 | CLK(NULL, "gpt8_ick", &gpt8_ick, CK_243X | CK_242X), | |
135 | CLK(NULL, "gpt8_fck", &gpt8_fck, CK_243X | CK_242X), | |
136 | CLK(NULL, "gpt9_ick", &gpt9_ick, CK_243X | CK_242X), | |
137 | CLK(NULL, "gpt9_fck", &gpt9_fck, CK_243X | CK_242X), | |
138 | CLK(NULL, "gpt10_ick", &gpt10_ick, CK_243X | CK_242X), | |
139 | CLK(NULL, "gpt10_fck", &gpt10_fck, CK_243X | CK_242X), | |
140 | CLK(NULL, "gpt11_ick", &gpt11_ick, CK_243X | CK_242X), | |
141 | CLK(NULL, "gpt11_fck", &gpt11_fck, CK_243X | CK_242X), | |
142 | CLK(NULL, "gpt12_ick", &gpt12_ick, CK_243X | CK_242X), | |
143 | CLK(NULL, "gpt12_fck", &gpt12_fck, CK_243X | CK_242X), | |
b820ce4e RK |
144 | CLK("omap-mcbsp.1", "ick", &mcbsp1_ick, CK_243X | CK_242X), |
145 | CLK("omap-mcbsp.1", "fck", &mcbsp1_fck, CK_243X | CK_242X), | |
146 | CLK("omap-mcbsp.2", "ick", &mcbsp2_ick, CK_243X | CK_242X), | |
147 | CLK("omap-mcbsp.2", "fck", &mcbsp2_fck, CK_243X | CK_242X), | |
148 | CLK("omap-mcbsp.3", "ick", &mcbsp3_ick, CK_243X), | |
149 | CLK("omap-mcbsp.3", "fck", &mcbsp3_fck, CK_243X), | |
150 | CLK("omap-mcbsp.4", "ick", &mcbsp4_ick, CK_243X), | |
151 | CLK("omap-mcbsp.4", "fck", &mcbsp4_fck, CK_243X), | |
152 | CLK("omap-mcbsp.5", "ick", &mcbsp5_ick, CK_243X), | |
153 | CLK("omap-mcbsp.5", "fck", &mcbsp5_fck, CK_243X), | |
1b5715ec RK |
154 | CLK("omap2_mcspi.1", "ick", &mcspi1_ick, CK_243X | CK_242X), |
155 | CLK("omap2_mcspi.1", "fck", &mcspi1_fck, CK_243X | CK_242X), | |
156 | CLK("omap2_mcspi.2", "ick", &mcspi2_ick, CK_243X | CK_242X), | |
157 | CLK("omap2_mcspi.2", "fck", &mcspi2_fck, CK_243X | CK_242X), | |
158 | CLK("omap2_mcspi.3", "ick", &mcspi3_ick, CK_243X), | |
159 | CLK("omap2_mcspi.3", "fck", &mcspi3_fck, CK_243X), | |
8ad8ff65 RK |
160 | CLK(NULL, "uart1_ick", &uart1_ick, CK_243X | CK_242X), |
161 | CLK(NULL, "uart1_fck", &uart1_fck, CK_243X | CK_242X), | |
162 | CLK(NULL, "uart2_ick", &uart2_ick, CK_243X | CK_242X), | |
163 | CLK(NULL, "uart2_fck", &uart2_fck, CK_243X | CK_242X), | |
164 | CLK(NULL, "uart3_ick", &uart3_ick, CK_243X | CK_242X), | |
165 | CLK(NULL, "uart3_fck", &uart3_fck, CK_243X | CK_242X), | |
166 | CLK(NULL, "gpios_ick", &gpios_ick, CK_243X | CK_242X), | |
167 | CLK(NULL, "gpios_fck", &gpios_fck, CK_243X | CK_242X), | |
39a80c7f RK |
168 | CLK("omap_wdt", "ick", &mpu_wdt_ick, CK_243X | CK_242X), |
169 | CLK("omap_wdt", "fck", &mpu_wdt_fck, CK_243X | CK_242X), | |
8ad8ff65 RK |
170 | CLK(NULL, "sync_32k_ick", &sync_32k_ick, CK_243X | CK_242X), |
171 | CLK(NULL, "wdt1_ick", &wdt1_ick, CK_243X | CK_242X), | |
172 | CLK(NULL, "omapctrl_ick", &omapctrl_ick, CK_243X | CK_242X), | |
173 | CLK(NULL, "icr_ick", &icr_ick, CK_243X), | |
6c5dbb40 RK |
174 | CLK("omap24xxcam", "fck", &cam_fck, CK_243X | CK_242X), |
175 | CLK("omap24xxcam", "ick", &cam_ick, CK_243X | CK_242X), | |
8ad8ff65 RK |
176 | CLK(NULL, "mailboxes_ick", &mailboxes_ick, CK_243X | CK_242X), |
177 | CLK(NULL, "wdt4_ick", &wdt4_ick, CK_243X | CK_242X), | |
178 | CLK(NULL, "wdt4_fck", &wdt4_fck, CK_243X | CK_242X), | |
179 | CLK(NULL, "wdt3_ick", &wdt3_ick, CK_242X), | |
180 | CLK(NULL, "wdt3_fck", &wdt3_fck, CK_242X), | |
181 | CLK(NULL, "mspro_ick", &mspro_ick, CK_243X | CK_242X), | |
182 | CLK(NULL, "mspro_fck", &mspro_fck, CK_243X | CK_242X), | |
5c9e02b1 RK |
183 | CLK("mmci-omap.0", "ick", &mmc_ick, CK_242X), |
184 | CLK("mmci-omap.0", "fck", &mmc_fck, CK_242X), | |
8ad8ff65 RK |
185 | CLK(NULL, "fac_ick", &fac_ick, CK_243X | CK_242X), |
186 | CLK(NULL, "fac_fck", &fac_fck, CK_243X | CK_242X), | |
187 | CLK(NULL, "eac_ick", &eac_ick, CK_242X), | |
188 | CLK(NULL, "eac_fck", &eac_fck, CK_242X), | |
cc51c9d4 RK |
189 | CLK("omap_hdq.0", "ick", &hdq_ick, CK_243X | CK_242X), |
190 | CLK("omap_hdq.1", "fck", &hdq_fck, CK_243X | CK_242X), | |
1d14de08 RK |
191 | CLK("i2c_omap.1", "ick", &i2c1_ick, CK_243X | CK_242X), |
192 | CLK("i2c_omap.1", "fck", &i2c1_fck, CK_242X), | |
193 | CLK("i2c_omap.1", "fck", &i2chs1_fck, CK_243X), | |
194 | CLK("i2c_omap.2", "ick", &i2c2_ick, CK_243X | CK_242X), | |
195 | CLK("i2c_omap.2", "fck", &i2c2_fck, CK_242X), | |
196 | CLK("i2c_omap.2", "fck", &i2chs2_fck, CK_243X), | |
8ad8ff65 RK |
197 | CLK(NULL, "gpmc_fck", &gpmc_fck, CK_243X | CK_242X), |
198 | CLK(NULL, "sdma_fck", &sdma_fck, CK_243X | CK_242X), | |
199 | CLK(NULL, "sdma_ick", &sdma_ick, CK_243X | CK_242X), | |
200 | CLK(NULL, "vlynq_ick", &vlynq_ick, CK_242X), | |
201 | CLK(NULL, "vlynq_fck", &vlynq_fck, CK_242X), | |
202 | CLK(NULL, "sdrc_ick", &sdrc_ick, CK_243X), | |
203 | CLK(NULL, "des_ick", &des_ick, CK_243X | CK_242X), | |
204 | CLK(NULL, "sha_ick", &sha_ick, CK_243X | CK_242X), | |
eeec7c8d | 205 | CLK("omap_rng", "ick", &rng_ick, CK_243X | CK_242X), |
8ad8ff65 RK |
206 | CLK(NULL, "aes_ick", &aes_ick, CK_243X | CK_242X), |
207 | CLK(NULL, "pka_ick", &pka_ick, CK_243X | CK_242X), | |
208 | CLK(NULL, "usb_fck", &usb_fck, CK_243X | CK_242X), | |
4ea60b0c | 209 | CLK("musb_hdrc", "ick", &usbhs_ick, CK_243X), |
6f7607cc RK |
210 | CLK("mmci-omap-hs.0", "ick", &mmchs1_ick, CK_243X), |
211 | CLK("mmci-omap-hs.0", "fck", &mmchs1_fck, CK_243X), | |
212 | CLK("mmci-omap-hs.1", "ick", &mmchs2_ick, CK_243X), | |
213 | CLK("mmci-omap-hs.1", "fck", &mmchs2_fck, CK_243X), | |
8ad8ff65 RK |
214 | CLK(NULL, "gpio5_ick", &gpio5_ick, CK_243X), |
215 | CLK(NULL, "gpio5_fck", &gpio5_fck, CK_243X), | |
216 | CLK(NULL, "mdm_intc_ick", &mdm_intc_ick, CK_243X), | |
217 | CLK("mmci-omap-hs.0", "mmchsdb_fck", &mmchsdb1_fck, CK_243X), | |
218 | CLK("mmci-omap-hs.1", "mmchsdb_fck", &mmchsdb2_fck, CK_243X), | |
219 | }; | |
220 | ||
6b8858a9 PW |
221 | /* CM_CLKEN_PLL.EN_{54,96}M_PLL options (24XX) */ |
222 | #define EN_APLL_STOPPED 0 | |
223 | #define EN_APLL_LOCKED 3 | |
ddc32a87 | 224 | |
6b8858a9 PW |
225 | /* CM_CLKSEL1_PLL.APLLS_CLKIN options (24XX) */ |
226 | #define APLLS_CLKIN_19_2MHZ 0 | |
227 | #define APLLS_CLKIN_13MHZ 2 | |
228 | #define APLLS_CLKIN_12MHZ 3 | |
229 | ||
230 | /* #define DOWN_VARIABLE_DPLL 1 */ /* Experimental */ | |
046d6b28 TL |
231 | |
232 | static struct prcm_config *curr_prcm_set; | |
ae78dcf7 TL |
233 | static struct clk *vclk; |
234 | static struct clk *sclk; | |
046d6b28 | 235 | |
8e3bd351 TL |
236 | static void __iomem *prcm_clksrc_ctrl; |
237 | ||
046d6b28 | 238 | /*------------------------------------------------------------------------- |
6b8858a9 | 239 | * Omap24xx specific clock functions |
046d6b28 TL |
240 | *-------------------------------------------------------------------------*/ |
241 | ||
c0bf3132 RK |
242 | /** |
243 | * omap2xxx_clk_get_core_rate - return the CORE_CLK rate | |
244 | * @clk: pointer to the combined dpll_ck + core_ck (currently "dpll_ck") | |
245 | * | |
246 | * Returns the CORE_CLK rate. CORE_CLK can have one of three rate | |
247 | * sources on OMAP2xxx: the DPLL CLKOUT rate, DPLL CLKOUTX2, or 32KHz | |
248 | * (the latter is unusual). This currently should be called with | |
249 | * struct clk *dpll_ck, which is a composite clock of dpll_ck and | |
250 | * core_ck. | |
251 | */ | |
252 | static unsigned long omap2xxx_clk_get_core_rate(struct clk *clk) | |
a16e9703 | 253 | { |
c0bf3132 RK |
254 | long long core_clk; |
255 | u32 v; | |
a16e9703 | 256 | |
c0bf3132 | 257 | core_clk = omap2_get_dpll_rate(clk); |
a16e9703 | 258 | |
c0bf3132 RK |
259 | v = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); |
260 | v &= OMAP24XX_CORE_CLK_SRC_MASK; | |
261 | ||
262 | if (v == CORE_CLK_SRC_32K) | |
263 | core_clk = 32768; | |
264 | else | |
265 | core_clk *= v; | |
a16e9703 | 266 | |
c0bf3132 | 267 | return core_clk; |
a16e9703 TL |
268 | } |
269 | ||
6b8858a9 PW |
270 | static int omap2_enable_osc_ck(struct clk *clk) |
271 | { | |
272 | u32 pcc; | |
273 | ||
8e3bd351 | 274 | pcc = __raw_readl(prcm_clksrc_ctrl); |
6b8858a9 | 275 | |
8e3bd351 | 276 | __raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); |
6b8858a9 PW |
277 | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static void omap2_disable_osc_ck(struct clk *clk) | |
282 | { | |
283 | u32 pcc; | |
284 | ||
8e3bd351 | 285 | pcc = __raw_readl(prcm_clksrc_ctrl); |
6b8858a9 | 286 | |
8e3bd351 | 287 | __raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); |
6b8858a9 PW |
288 | } |
289 | ||
548d8495 RK |
290 | static const struct clkops clkops_oscck = { |
291 | .enable = &omap2_enable_osc_ck, | |
292 | .disable = &omap2_disable_osc_ck, | |
293 | }; | |
294 | ||
6b8858a9 | 295 | #ifdef OLD_CK |
046d6b28 TL |
296 | /* Recalculate SYST_CLK */ |
297 | static void omap2_sys_clk_recalc(struct clk * clk) | |
298 | { | |
299 | u32 div = PRCM_CLKSRC_CTRL; | |
300 | div &= (1 << 7) | (1 << 6); /* Test if ext clk divided by 1 or 2 */ | |
301 | div >>= clk->rate_offset; | |
302 | clk->rate = (clk->parent->rate / div); | |
303 | propagate_rate(clk); | |
304 | } | |
6b8858a9 | 305 | #endif /* OLD_CK */ |
046d6b28 | 306 | |
046d6b28 | 307 | /* Enable an APLL if off */ |
6b8858a9 | 308 | static int omap2_clk_fixed_enable(struct clk *clk) |
046d6b28 | 309 | { |
6b8858a9 | 310 | u32 cval, apll_mask; |
046d6b28 | 311 | |
6b8858a9 | 312 | apll_mask = EN_APLL_LOCKED << clk->enable_bit; |
046d6b28 | 313 | |
6b8858a9 | 314 | cval = cm_read_mod_reg(PLL_MOD, CM_CLKEN); |
046d6b28 | 315 | |
6b8858a9 PW |
316 | if ((cval & apll_mask) == apll_mask) |
317 | return 0; /* apll already enabled */ | |
046d6b28 | 318 | |
6b8858a9 PW |
319 | cval &= ~apll_mask; |
320 | cval |= apll_mask; | |
321 | cm_write_mod_reg(cval, PLL_MOD, CM_CLKEN); | |
046d6b28 TL |
322 | |
323 | if (clk == &apll96_ck) | |
6b8858a9 | 324 | cval = OMAP24XX_ST_96M_APLL; |
046d6b28 | 325 | else if (clk == &apll54_ck) |
6b8858a9 | 326 | cval = OMAP24XX_ST_54M_APLL; |
046d6b28 | 327 | |
6b8858a9 PW |
328 | omap2_wait_clock_ready(OMAP_CM_REGADDR(PLL_MOD, CM_IDLEST), cval, |
329 | clk->name); | |
330 | ||
331 | /* | |
332 | * REVISIT: Should we return an error code if omap2_wait_clock_ready() | |
333 | * fails? | |
334 | */ | |
335 | return 0; | |
046d6b28 TL |
336 | } |
337 | ||
046d6b28 TL |
338 | /* Stop APLL */ |
339 | static void omap2_clk_fixed_disable(struct clk *clk) | |
340 | { | |
341 | u32 cval; | |
342 | ||
6b8858a9 PW |
343 | cval = cm_read_mod_reg(PLL_MOD, CM_CLKEN); |
344 | cval &= ~(EN_APLL_LOCKED << clk->enable_bit); | |
345 | cm_write_mod_reg(cval, PLL_MOD, CM_CLKEN); | |
046d6b28 TL |
346 | } |
347 | ||
548d8495 RK |
348 | static const struct clkops clkops_fixed = { |
349 | .enable = &omap2_clk_fixed_enable, | |
350 | .disable = &omap2_clk_fixed_disable, | |
351 | }; | |
352 | ||
046d6b28 TL |
353 | /* |
354 | * Uses the current prcm set to tell if a rate is valid. | |
355 | * You can go slower, but not faster within a given rate set. | |
356 | */ | |
fecb494b | 357 | static long omap2_dpllcore_round_rate(unsigned long target_rate) |
046d6b28 | 358 | { |
6b8858a9 | 359 | u32 high, low, core_clk_src; |
046d6b28 | 360 | |
6b8858a9 PW |
361 | core_clk_src = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); |
362 | core_clk_src &= OMAP24XX_CORE_CLK_SRC_MASK; | |
363 | ||
364 | if (core_clk_src == CORE_CLK_SRC_DPLL) { /* DPLL clockout */ | |
046d6b28 TL |
365 | high = curr_prcm_set->dpll_speed * 2; |
366 | low = curr_prcm_set->dpll_speed; | |
367 | } else { /* DPLL clockout x 2 */ | |
368 | high = curr_prcm_set->dpll_speed; | |
369 | low = curr_prcm_set->dpll_speed / 2; | |
370 | } | |
371 | ||
372 | #ifdef DOWN_VARIABLE_DPLL | |
373 | if (target_rate > high) | |
374 | return high; | |
375 | else | |
376 | return target_rate; | |
377 | #else | |
378 | if (target_rate > low) | |
379 | return high; | |
380 | else | |
381 | return low; | |
382 | #endif | |
383 | ||
384 | } | |
385 | ||
8b9dbc16 | 386 | static unsigned long omap2_dpllcore_recalc(struct clk *clk) |
6b8858a9 | 387 | { |
c0bf3132 | 388 | return omap2xxx_clk_get_core_rate(clk); |
6b8858a9 | 389 | } |
046d6b28 | 390 | |
88b8ba90 | 391 | static int omap2_reprogram_dpllcore(struct clk *clk, unsigned long rate) |
046d6b28 | 392 | { |
6b8858a9 | 393 | u32 cur_rate, low, mult, div, valid_rate, done_rate; |
046d6b28 TL |
394 | u32 bypass = 0; |
395 | struct prcm_config tmpset; | |
6b8858a9 | 396 | const struct dpll_data *dd; |
046d6b28 | 397 | |
c0bf3132 | 398 | cur_rate = omap2xxx_clk_get_core_rate(&dpll_ck); |
6b8858a9 PW |
399 | mult = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); |
400 | mult &= OMAP24XX_CORE_CLK_SRC_MASK; | |
046d6b28 TL |
401 | |
402 | if ((rate == (cur_rate / 2)) && (mult == 2)) { | |
f2ab9977 | 403 | omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1); |
046d6b28 | 404 | } else if ((rate == (cur_rate * 2)) && (mult == 1)) { |
f2ab9977 | 405 | omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); |
046d6b28 | 406 | } else if (rate != cur_rate) { |
88b8ba90 | 407 | valid_rate = omap2_dpllcore_round_rate(rate); |
046d6b28 | 408 | if (valid_rate != rate) |
883992bd | 409 | return -EINVAL; |
046d6b28 | 410 | |
6b8858a9 | 411 | if (mult == 1) |
046d6b28 TL |
412 | low = curr_prcm_set->dpll_speed; |
413 | else | |
414 | low = curr_prcm_set->dpll_speed / 2; | |
415 | ||
6b8858a9 PW |
416 | dd = clk->dpll_data; |
417 | if (!dd) | |
883992bd | 418 | return -EINVAL; |
6b8858a9 PW |
419 | |
420 | tmpset.cm_clksel1_pll = __raw_readl(dd->mult_div1_reg); | |
421 | tmpset.cm_clksel1_pll &= ~(dd->mult_mask | | |
422 | dd->div1_mask); | |
046d6b28 | 423 | div = ((curr_prcm_set->xtal_speed / 1000000) - 1); |
6b8858a9 PW |
424 | tmpset.cm_clksel2_pll = cm_read_mod_reg(PLL_MOD, CM_CLKSEL2); |
425 | tmpset.cm_clksel2_pll &= ~OMAP24XX_CORE_CLK_SRC_MASK; | |
046d6b28 | 426 | if (rate > low) { |
6b8858a9 | 427 | tmpset.cm_clksel2_pll |= CORE_CLK_SRC_DPLL_X2; |
046d6b28 | 428 | mult = ((rate / 2) / 1000000); |
6b8858a9 | 429 | done_rate = CORE_CLK_SRC_DPLL_X2; |
046d6b28 | 430 | } else { |
6b8858a9 | 431 | tmpset.cm_clksel2_pll |= CORE_CLK_SRC_DPLL; |
046d6b28 | 432 | mult = (rate / 1000000); |
6b8858a9 | 433 | done_rate = CORE_CLK_SRC_DPLL; |
046d6b28 | 434 | } |
6b8858a9 PW |
435 | tmpset.cm_clksel1_pll |= (div << __ffs(dd->mult_mask)); |
436 | tmpset.cm_clksel1_pll |= (mult << __ffs(dd->div1_mask)); | |
046d6b28 TL |
437 | |
438 | /* Worst case */ | |
6b8858a9 | 439 | tmpset.base_sdrc_rfr = SDRC_RFR_CTRL_BYPASS; |
046d6b28 TL |
440 | |
441 | if (rate == curr_prcm_set->xtal_speed) /* If asking for 1-1 */ | |
442 | bypass = 1; | |
443 | ||
f2ab9977 PW |
444 | /* For omap2xxx_sdrc_init_params() */ |
445 | omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); | |
046d6b28 TL |
446 | |
447 | /* Force dll lock mode */ | |
448 | omap2_set_prcm(tmpset.cm_clksel1_pll, tmpset.base_sdrc_rfr, | |
449 | bypass); | |
450 | ||
451 | /* Errata: ret dll entry state */ | |
f2ab9977 PW |
452 | omap2xxx_sdrc_init_params(omap2xxx_sdrc_dll_is_unlocked()); |
453 | omap2xxx_sdrc_reprogram(done_rate, 0); | |
046d6b28 | 454 | } |
046d6b28 | 455 | |
883992bd | 456 | return 0; |
046d6b28 TL |
457 | } |
458 | ||
6b8858a9 PW |
459 | /** |
460 | * omap2_table_mpu_recalc - just return the MPU speed | |
461 | * @clk: virt_prcm_set struct clk | |
462 | * | |
463 | * Set virt_prcm_set's rate to the mpu_speed field of the current PRCM set. | |
464 | */ | |
8b9dbc16 | 465 | static unsigned long omap2_table_mpu_recalc(struct clk *clk) |
046d6b28 | 466 | { |
8b9dbc16 | 467 | return curr_prcm_set->mpu_speed; |
046d6b28 TL |
468 | } |
469 | ||
470 | /* | |
471 | * Look for a rate equal or less than the target rate given a configuration set. | |
472 | * | |
473 | * What's not entirely clear is "which" field represents the key field. | |
474 | * Some might argue L3-DDR, others ARM, others IVA. This code is simple and | |
475 | * just uses the ARM rates. | |
476 | */ | |
6b8858a9 | 477 | static long omap2_round_to_table_rate(struct clk *clk, unsigned long rate) |
046d6b28 | 478 | { |
6b8858a9 | 479 | struct prcm_config *ptr; |
046d6b28 TL |
480 | long highest_rate; |
481 | ||
482 | if (clk != &virt_prcm_set) | |
483 | return -EINVAL; | |
484 | ||
485 | highest_rate = -EINVAL; | |
486 | ||
487 | for (ptr = rate_table; ptr->mpu_speed; ptr++) { | |
6b8858a9 PW |
488 | if (!(ptr->flags & cpu_mask)) |
489 | continue; | |
046d6b28 TL |
490 | if (ptr->xtal_speed != sys_ck.rate) |
491 | continue; | |
492 | ||
493 | highest_rate = ptr->mpu_speed; | |
494 | ||
495 | /* Can check only after xtal frequency check */ | |
496 | if (ptr->mpu_speed <= rate) | |
497 | break; | |
498 | } | |
499 | return highest_rate; | |
500 | } | |
501 | ||
046d6b28 | 502 | /* Sets basic clocks based on the specified rate */ |
6b8858a9 | 503 | static int omap2_select_table_rate(struct clk *clk, unsigned long rate) |
046d6b28 | 504 | { |
6b8858a9 | 505 | u32 cur_rate, done_rate, bypass = 0, tmp; |
046d6b28 TL |
506 | struct prcm_config *prcm; |
507 | unsigned long found_speed = 0; | |
6b8858a9 | 508 | unsigned long flags; |
046d6b28 TL |
509 | |
510 | if (clk != &virt_prcm_set) | |
511 | return -EINVAL; | |
512 | ||
046d6b28 TL |
513 | for (prcm = rate_table; prcm->mpu_speed; prcm++) { |
514 | if (!(prcm->flags & cpu_mask)) | |
515 | continue; | |
516 | ||
517 | if (prcm->xtal_speed != sys_ck.rate) | |
518 | continue; | |
519 | ||
520 | if (prcm->mpu_speed <= rate) { | |
521 | found_speed = prcm->mpu_speed; | |
522 | break; | |
523 | } | |
524 | } | |
525 | ||
526 | if (!found_speed) { | |
527 | printk(KERN_INFO "Could not set MPU rate to %luMHz\n", | |
a16e9703 | 528 | rate / 1000000); |
046d6b28 TL |
529 | return -EINVAL; |
530 | } | |
531 | ||
532 | curr_prcm_set = prcm; | |
c0bf3132 | 533 | cur_rate = omap2xxx_clk_get_core_rate(&dpll_ck); |
046d6b28 TL |
534 | |
535 | if (prcm->dpll_speed == cur_rate / 2) { | |
f2ab9977 | 536 | omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL, 1); |
046d6b28 | 537 | } else if (prcm->dpll_speed == cur_rate * 2) { |
f2ab9977 | 538 | omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); |
046d6b28 TL |
539 | } else if (prcm->dpll_speed != cur_rate) { |
540 | local_irq_save(flags); | |
541 | ||
542 | if (prcm->dpll_speed == prcm->xtal_speed) | |
543 | bypass = 1; | |
544 | ||
6b8858a9 PW |
545 | if ((prcm->cm_clksel2_pll & OMAP24XX_CORE_CLK_SRC_MASK) == |
546 | CORE_CLK_SRC_DPLL_X2) | |
547 | done_rate = CORE_CLK_SRC_DPLL_X2; | |
046d6b28 | 548 | else |
6b8858a9 | 549 | done_rate = CORE_CLK_SRC_DPLL; |
046d6b28 TL |
550 | |
551 | /* MPU divider */ | |
6b8858a9 | 552 | cm_write_mod_reg(prcm->cm_clksel_mpu, MPU_MOD, CM_CLKSEL); |
046d6b28 TL |
553 | |
554 | /* dsp + iva1 div(2420), iva2.1(2430) */ | |
6b8858a9 PW |
555 | cm_write_mod_reg(prcm->cm_clksel_dsp, |
556 | OMAP24XX_DSP_MOD, CM_CLKSEL); | |
046d6b28 | 557 | |
6b8858a9 | 558 | cm_write_mod_reg(prcm->cm_clksel_gfx, GFX_MOD, CM_CLKSEL); |
046d6b28 TL |
559 | |
560 | /* Major subsystem dividers */ | |
6b8858a9 | 561 | tmp = cm_read_mod_reg(CORE_MOD, CM_CLKSEL1) & OMAP24XX_CLKSEL_DSS2_MASK; |
fecb494b PW |
562 | cm_write_mod_reg(prcm->cm_clksel1_core | tmp, CORE_MOD, |
563 | CM_CLKSEL1); | |
564 | ||
046d6b28 | 565 | if (cpu_is_omap2430()) |
6b8858a9 PW |
566 | cm_write_mod_reg(prcm->cm_clksel_mdm, |
567 | OMAP2430_MDM_MOD, CM_CLKSEL); | |
046d6b28 | 568 | |
f2ab9977 PW |
569 | /* x2 to enter omap2xxx_sdrc_init_params() */ |
570 | omap2xxx_sdrc_reprogram(CORE_CLK_SRC_DPLL_X2, 1); | |
046d6b28 TL |
571 | |
572 | omap2_set_prcm(prcm->cm_clksel1_pll, prcm->base_sdrc_rfr, | |
573 | bypass); | |
574 | ||
f2ab9977 PW |
575 | omap2xxx_sdrc_init_params(omap2xxx_sdrc_dll_is_unlocked()); |
576 | omap2xxx_sdrc_reprogram(done_rate, 0); | |
046d6b28 TL |
577 | |
578 | local_irq_restore(flags); | |
579 | } | |
046d6b28 TL |
580 | |
581 | return 0; | |
582 | } | |
583 | ||
aeec2990 KH |
584 | #ifdef CONFIG_CPU_FREQ |
585 | /* | |
586 | * Walk PRCM rate table and fillout cpufreq freq_table | |
587 | */ | |
588 | static struct cpufreq_frequency_table freq_table[ARRAY_SIZE(rate_table)]; | |
589 | ||
590 | void omap2_clk_init_cpufreq_table(struct cpufreq_frequency_table **table) | |
591 | { | |
592 | struct prcm_config *prcm; | |
593 | int i = 0; | |
594 | ||
595 | for (prcm = rate_table; prcm->mpu_speed; prcm++) { | |
596 | if (!(prcm->flags & cpu_mask)) | |
597 | continue; | |
598 | if (prcm->xtal_speed != sys_ck.rate) | |
599 | continue; | |
600 | ||
601 | /* don't put bypass rates in table */ | |
602 | if (prcm->dpll_speed == prcm->xtal_speed) | |
603 | continue; | |
604 | ||
605 | freq_table[i].index = i; | |
606 | freq_table[i].frequency = prcm->mpu_speed / 1000; | |
607 | i++; | |
608 | } | |
609 | ||
610 | if (i == 0) { | |
611 | printk(KERN_WARNING "%s: failed to initialize frequency " | |
612 | "table\n", __func__); | |
613 | return; | |
614 | } | |
615 | ||
616 | freq_table[i].index = i; | |
617 | freq_table[i].frequency = CPUFREQ_TABLE_END; | |
618 | ||
619 | *table = &freq_table[0]; | |
620 | } | |
621 | #endif | |
622 | ||
046d6b28 TL |
623 | static struct clk_functions omap2_clk_functions = { |
624 | .clk_enable = omap2_clk_enable, | |
625 | .clk_disable = omap2_clk_disable, | |
046d6b28 TL |
626 | .clk_round_rate = omap2_clk_round_rate, |
627 | .clk_set_rate = omap2_clk_set_rate, | |
628 | .clk_set_parent = omap2_clk_set_parent, | |
90afd5cb | 629 | .clk_disable_unused = omap2_clk_disable_unused, |
aeec2990 KH |
630 | #ifdef CONFIG_CPU_FREQ |
631 | .clk_init_cpufreq_table = omap2_clk_init_cpufreq_table, | |
632 | #endif | |
046d6b28 TL |
633 | }; |
634 | ||
6b8858a9 | 635 | static u32 omap2_get_apll_clkin(void) |
046d6b28 | 636 | { |
fecb494b | 637 | u32 aplls, srate = 0; |
046d6b28 | 638 | |
6b8858a9 PW |
639 | aplls = cm_read_mod_reg(PLL_MOD, CM_CLKSEL1); |
640 | aplls &= OMAP24XX_APLLS_CLKIN_MASK; | |
641 | aplls >>= OMAP24XX_APLLS_CLKIN_SHIFT; | |
046d6b28 | 642 | |
6b8858a9 | 643 | if (aplls == APLLS_CLKIN_19_2MHZ) |
fecb494b | 644 | srate = 19200000; |
6b8858a9 | 645 | else if (aplls == APLLS_CLKIN_13MHZ) |
fecb494b | 646 | srate = 13000000; |
6b8858a9 | 647 | else if (aplls == APLLS_CLKIN_12MHZ) |
fecb494b | 648 | srate = 12000000; |
046d6b28 | 649 | |
fecb494b | 650 | return srate; |
6b8858a9 PW |
651 | } |
652 | ||
653 | static u32 omap2_get_sysclkdiv(void) | |
654 | { | |
655 | u32 div; | |
656 | ||
8e3bd351 | 657 | div = __raw_readl(prcm_clksrc_ctrl); |
6b8858a9 PW |
658 | div &= OMAP_SYSCLKDIV_MASK; |
659 | div >>= OMAP_SYSCLKDIV_SHIFT; | |
046d6b28 | 660 | |
6b8858a9 PW |
661 | return div; |
662 | } | |
663 | ||
8b9dbc16 | 664 | static unsigned long omap2_osc_clk_recalc(struct clk *clk) |
6b8858a9 | 665 | { |
8b9dbc16 | 666 | return omap2_get_apll_clkin() * omap2_get_sysclkdiv(); |
6b8858a9 PW |
667 | } |
668 | ||
8b9dbc16 | 669 | static unsigned long omap2_sys_clk_recalc(struct clk *clk) |
6b8858a9 | 670 | { |
8b9dbc16 | 671 | return clk->parent->rate / omap2_get_sysclkdiv(); |
046d6b28 TL |
672 | } |
673 | ||
ae78dcf7 TL |
674 | /* |
675 | * Set clocks for bypass mode for reboot to work. | |
676 | */ | |
677 | void omap2_clk_prepare_for_reboot(void) | |
678 | { | |
679 | u32 rate; | |
680 | ||
681 | if (vclk == NULL || sclk == NULL) | |
682 | return; | |
683 | ||
684 | rate = clk_get_rate(sclk); | |
685 | clk_set_rate(vclk, rate); | |
686 | } | |
687 | ||
046d6b28 TL |
688 | /* |
689 | * Switch the MPU rate if specified on cmdline. | |
690 | * We cannot do this early until cmdline is parsed. | |
691 | */ | |
692 | static int __init omap2_clk_arch_init(void) | |
693 | { | |
694 | if (!mpurate) | |
695 | return -EINVAL; | |
696 | ||
7b0f89d7 | 697 | if (clk_set_rate(&virt_prcm_set, mpurate)) |
046d6b28 TL |
698 | printk(KERN_ERR "Could not find matching MPU rate\n"); |
699 | ||
6b8858a9 | 700 | recalculate_root_clocks(); |
046d6b28 TL |
701 | |
702 | printk(KERN_INFO "Switched to new clocking rate (Crystal/DPLL/MPU): " | |
703 | "%ld.%01ld/%ld/%ld MHz\n", | |
704 | (sys_ck.rate / 1000000), (sys_ck.rate / 100000) % 10, | |
705 | (dpll_ck.rate / 1000000), (mpu_ck.rate / 1000000)) ; | |
706 | ||
707 | return 0; | |
708 | } | |
709 | arch_initcall(omap2_clk_arch_init); | |
710 | ||
711 | int __init omap2_clk_init(void) | |
712 | { | |
713 | struct prcm_config *prcm; | |
8ad8ff65 | 714 | struct omap_clk *c; |
15ca78f7 | 715 | u32 clkrate; |
046d6b28 | 716 | |
8e3bd351 TL |
717 | if (cpu_is_omap242x()) { |
718 | prcm_clksrc_ctrl = OMAP2420_PRCM_CLKSRC_CTRL; | |
6b8858a9 | 719 | cpu_mask = RATE_IN_242X; |
8e3bd351 TL |
720 | } else if (cpu_is_omap2430()) { |
721 | prcm_clksrc_ctrl = OMAP2430_PRCM_CLKSRC_CTRL; | |
6b8858a9 | 722 | cpu_mask = RATE_IN_243X; |
8e3bd351 | 723 | } |
6b8858a9 | 724 | |
046d6b28 | 725 | clk_init(&omap2_clk_functions); |
046d6b28 | 726 | |
c8088112 | 727 | for (c = omap24xx_clks; c < omap24xx_clks + ARRAY_SIZE(omap24xx_clks); c++) |
79716870 | 728 | clk_preinit(c->lk.clk); |
c8088112 | 729 | |
8b9dbc16 | 730 | osc_ck.rate = omap2_osc_clk_recalc(&osc_ck); |
9a5fedac | 731 | propagate_rate(&osc_ck); |
8b9dbc16 | 732 | sys_ck.rate = omap2_sys_clk_recalc(&sys_ck); |
9a5fedac | 733 | propagate_rate(&sys_ck); |
6b8858a9 | 734 | |
8ad8ff65 RK |
735 | for (c = omap24xx_clks; c < omap24xx_clks + ARRAY_SIZE(omap24xx_clks); c++) |
736 | if (c->cpu & cpu_mask) { | |
737 | clkdev_add(&c->lk); | |
738 | clk_register(c->lk.clk); | |
046d6b28 TL |
739 | } |
740 | ||
046d6b28 | 741 | /* Check the MPU rate set by bootloader */ |
c0bf3132 | 742 | clkrate = omap2xxx_clk_get_core_rate(&dpll_ck); |
046d6b28 | 743 | for (prcm = rate_table; prcm->mpu_speed; prcm++) { |
6b8858a9 PW |
744 | if (!(prcm->flags & cpu_mask)) |
745 | continue; | |
046d6b28 TL |
746 | if (prcm->xtal_speed != sys_ck.rate) |
747 | continue; | |
748 | if (prcm->dpll_speed <= clkrate) | |
749 | break; | |
750 | } | |
751 | curr_prcm_set = prcm; | |
752 | ||
6b8858a9 | 753 | recalculate_root_clocks(); |
046d6b28 TL |
754 | |
755 | printk(KERN_INFO "Clocking rate (Crystal/DPLL/MPU): " | |
756 | "%ld.%01ld/%ld/%ld MHz\n", | |
757 | (sys_ck.rate / 1000000), (sys_ck.rate / 100000) % 10, | |
758 | (dpll_ck.rate / 1000000), (mpu_ck.rate / 1000000)) ; | |
759 | ||
760 | /* | |
761 | * Only enable those clocks we will need, let the drivers | |
762 | * enable other clocks as necessary | |
763 | */ | |
6b8858a9 | 764 | clk_enable_init_clocks(); |
046d6b28 | 765 | |
ae78dcf7 TL |
766 | /* Avoid sleeping sleeping during omap2_clk_prepare_for_reboot() */ |
767 | vclk = clk_get(NULL, "virt_prcm_set"); | |
768 | sclk = clk_get(NULL, "sys_ck"); | |
769 | ||
046d6b28 TL |
770 | return 0; |
771 | } |