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Merge tag 'fcoe-3.13' into for-linus
[deliverable/linux.git] / drivers / clk / clk-u300.c
1 /*
2 * U300 clock implementation
3 * Copyright (C) 2007-2012 ST-Ericsson AB
4 * License terms: GNU General Public License (GPL) version 2
5 * Author: Linus Walleij <linus.walleij@stericsson.com>
6 * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
7 */
8 #include <linux/clk.h>
9 #include <linux/clkdev.h>
10 #include <linux/err.h>
11 #include <linux/io.h>
12 #include <linux/clk-provider.h>
13 #include <linux/spinlock.h>
14 #include <linux/of.h>
15
16 /* APP side SYSCON registers */
17 /* CLK Control Register 16bit (R/W) */
18 #define U300_SYSCON_CCR (0x0000)
19 #define U300_SYSCON_CCR_I2S1_USE_VCXO (0x0040)
20 #define U300_SYSCON_CCR_I2S0_USE_VCXO (0x0020)
21 #define U300_SYSCON_CCR_TURN_VCXO_ON (0x0008)
22 #define U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK (0x0007)
23 #define U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER (0x04)
24 #define U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW (0x03)
25 #define U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE (0x02)
26 #define U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH (0x01)
27 #define U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST (0x00)
28 /* CLK Status Register 16bit (R/W) */
29 #define U300_SYSCON_CSR (0x0004)
30 #define U300_SYSCON_CSR_PLL208_LOCK_IND (0x0002)
31 #define U300_SYSCON_CSR_PLL13_LOCK_IND (0x0001)
32 /* Reset lines for SLOW devices 16bit (R/W) */
33 #define U300_SYSCON_RSR (0x0014)
34 #define U300_SYSCON_RSR_PPM_RESET_EN (0x0200)
35 #define U300_SYSCON_RSR_ACC_TMR_RESET_EN (0x0100)
36 #define U300_SYSCON_RSR_APP_TMR_RESET_EN (0x0080)
37 #define U300_SYSCON_RSR_RTC_RESET_EN (0x0040)
38 #define U300_SYSCON_RSR_KEYPAD_RESET_EN (0x0020)
39 #define U300_SYSCON_RSR_GPIO_RESET_EN (0x0010)
40 #define U300_SYSCON_RSR_EH_RESET_EN (0x0008)
41 #define U300_SYSCON_RSR_BTR_RESET_EN (0x0004)
42 #define U300_SYSCON_RSR_UART_RESET_EN (0x0002)
43 #define U300_SYSCON_RSR_SLOW_BRIDGE_RESET_EN (0x0001)
44 /* Reset lines for FAST devices 16bit (R/W) */
45 #define U300_SYSCON_RFR (0x0018)
46 #define U300_SYSCON_RFR_UART1_RESET_ENABLE (0x0080)
47 #define U300_SYSCON_RFR_SPI_RESET_ENABLE (0x0040)
48 #define U300_SYSCON_RFR_MMC_RESET_ENABLE (0x0020)
49 #define U300_SYSCON_RFR_PCM_I2S1_RESET_ENABLE (0x0010)
50 #define U300_SYSCON_RFR_PCM_I2S0_RESET_ENABLE (0x0008)
51 #define U300_SYSCON_RFR_I2C1_RESET_ENABLE (0x0004)
52 #define U300_SYSCON_RFR_I2C0_RESET_ENABLE (0x0002)
53 #define U300_SYSCON_RFR_FAST_BRIDGE_RESET_ENABLE (0x0001)
54 /* Reset lines for the rest of the peripherals 16bit (R/W) */
55 #define U300_SYSCON_RRR (0x001c)
56 #define U300_SYSCON_RRR_CDS_RESET_EN (0x4000)
57 #define U300_SYSCON_RRR_ISP_RESET_EN (0x2000)
58 #define U300_SYSCON_RRR_INTCON_RESET_EN (0x1000)
59 #define U300_SYSCON_RRR_MSPRO_RESET_EN (0x0800)
60 #define U300_SYSCON_RRR_XGAM_RESET_EN (0x0100)
61 #define U300_SYSCON_RRR_XGAM_VC_SYNC_RESET_EN (0x0080)
62 #define U300_SYSCON_RRR_NANDIF_RESET_EN (0x0040)
63 #define U300_SYSCON_RRR_EMIF_RESET_EN (0x0020)
64 #define U300_SYSCON_RRR_DMAC_RESET_EN (0x0010)
65 #define U300_SYSCON_RRR_CPU_RESET_EN (0x0008)
66 #define U300_SYSCON_RRR_APEX_RESET_EN (0x0004)
67 #define U300_SYSCON_RRR_AHB_RESET_EN (0x0002)
68 #define U300_SYSCON_RRR_AAIF_RESET_EN (0x0001)
69 /* Clock enable for SLOW peripherals 16bit (R/W) */
70 #define U300_SYSCON_CESR (0x0020)
71 #define U300_SYSCON_CESR_PPM_CLK_EN (0x0200)
72 #define U300_SYSCON_CESR_ACC_TMR_CLK_EN (0x0100)
73 #define U300_SYSCON_CESR_APP_TMR_CLK_EN (0x0080)
74 #define U300_SYSCON_CESR_KEYPAD_CLK_EN (0x0040)
75 #define U300_SYSCON_CESR_GPIO_CLK_EN (0x0010)
76 #define U300_SYSCON_CESR_EH_CLK_EN (0x0008)
77 #define U300_SYSCON_CESR_BTR_CLK_EN (0x0004)
78 #define U300_SYSCON_CESR_UART_CLK_EN (0x0002)
79 #define U300_SYSCON_CESR_SLOW_BRIDGE_CLK_EN (0x0001)
80 /* Clock enable for FAST peripherals 16bit (R/W) */
81 #define U300_SYSCON_CEFR (0x0024)
82 #define U300_SYSCON_CEFR_UART1_CLK_EN (0x0200)
83 #define U300_SYSCON_CEFR_I2S1_CORE_CLK_EN (0x0100)
84 #define U300_SYSCON_CEFR_I2S0_CORE_CLK_EN (0x0080)
85 #define U300_SYSCON_CEFR_SPI_CLK_EN (0x0040)
86 #define U300_SYSCON_CEFR_MMC_CLK_EN (0x0020)
87 #define U300_SYSCON_CEFR_I2S1_CLK_EN (0x0010)
88 #define U300_SYSCON_CEFR_I2S0_CLK_EN (0x0008)
89 #define U300_SYSCON_CEFR_I2C1_CLK_EN (0x0004)
90 #define U300_SYSCON_CEFR_I2C0_CLK_EN (0x0002)
91 #define U300_SYSCON_CEFR_FAST_BRIDGE_CLK_EN (0x0001)
92 /* Clock enable for the rest of the peripherals 16bit (R/W) */
93 #define U300_SYSCON_CERR (0x0028)
94 #define U300_SYSCON_CERR_CDS_CLK_EN (0x2000)
95 #define U300_SYSCON_CERR_ISP_CLK_EN (0x1000)
96 #define U300_SYSCON_CERR_MSPRO_CLK_EN (0x0800)
97 #define U300_SYSCON_CERR_AHB_SUBSYS_BRIDGE_CLK_EN (0x0400)
98 #define U300_SYSCON_CERR_SEMI_CLK_EN (0x0200)
99 #define U300_SYSCON_CERR_XGAM_CLK_EN (0x0100)
100 #define U300_SYSCON_CERR_VIDEO_ENC_CLK_EN (0x0080)
101 #define U300_SYSCON_CERR_NANDIF_CLK_EN (0x0040)
102 #define U300_SYSCON_CERR_EMIF_CLK_EN (0x0020)
103 #define U300_SYSCON_CERR_DMAC_CLK_EN (0x0010)
104 #define U300_SYSCON_CERR_CPU_CLK_EN (0x0008)
105 #define U300_SYSCON_CERR_APEX_CLK_EN (0x0004)
106 #define U300_SYSCON_CERR_AHB_CLK_EN (0x0002)
107 #define U300_SYSCON_CERR_AAIF_CLK_EN (0x0001)
108 /* Single block clock enable 16bit (-/W) */
109 #define U300_SYSCON_SBCER (0x002c)
110 #define U300_SYSCON_SBCER_PPM_CLK_EN (0x0009)
111 #define U300_SYSCON_SBCER_ACC_TMR_CLK_EN (0x0008)
112 #define U300_SYSCON_SBCER_APP_TMR_CLK_EN (0x0007)
113 #define U300_SYSCON_SBCER_KEYPAD_CLK_EN (0x0006)
114 #define U300_SYSCON_SBCER_GPIO_CLK_EN (0x0004)
115 #define U300_SYSCON_SBCER_EH_CLK_EN (0x0003)
116 #define U300_SYSCON_SBCER_BTR_CLK_EN (0x0002)
117 #define U300_SYSCON_SBCER_UART_CLK_EN (0x0001)
118 #define U300_SYSCON_SBCER_SLOW_BRIDGE_CLK_EN (0x0000)
119 #define U300_SYSCON_SBCER_UART1_CLK_EN (0x0019)
120 #define U300_SYSCON_SBCER_I2S1_CORE_CLK_EN (0x0018)
121 #define U300_SYSCON_SBCER_I2S0_CORE_CLK_EN (0x0017)
122 #define U300_SYSCON_SBCER_SPI_CLK_EN (0x0016)
123 #define U300_SYSCON_SBCER_MMC_CLK_EN (0x0015)
124 #define U300_SYSCON_SBCER_I2S1_CLK_EN (0x0014)
125 #define U300_SYSCON_SBCER_I2S0_CLK_EN (0x0013)
126 #define U300_SYSCON_SBCER_I2C1_CLK_EN (0x0012)
127 #define U300_SYSCON_SBCER_I2C0_CLK_EN (0x0011)
128 #define U300_SYSCON_SBCER_FAST_BRIDGE_CLK_EN (0x0010)
129 #define U300_SYSCON_SBCER_CDS_CLK_EN (0x002D)
130 #define U300_SYSCON_SBCER_ISP_CLK_EN (0x002C)
131 #define U300_SYSCON_SBCER_MSPRO_CLK_EN (0x002B)
132 #define U300_SYSCON_SBCER_AHB_SUBSYS_BRIDGE_CLK_EN (0x002A)
133 #define U300_SYSCON_SBCER_SEMI_CLK_EN (0x0029)
134 #define U300_SYSCON_SBCER_XGAM_CLK_EN (0x0028)
135 #define U300_SYSCON_SBCER_VIDEO_ENC_CLK_EN (0x0027)
136 #define U300_SYSCON_SBCER_NANDIF_CLK_EN (0x0026)
137 #define U300_SYSCON_SBCER_EMIF_CLK_EN (0x0025)
138 #define U300_SYSCON_SBCER_DMAC_CLK_EN (0x0024)
139 #define U300_SYSCON_SBCER_CPU_CLK_EN (0x0023)
140 #define U300_SYSCON_SBCER_APEX_CLK_EN (0x0022)
141 #define U300_SYSCON_SBCER_AHB_CLK_EN (0x0021)
142 #define U300_SYSCON_SBCER_AAIF_CLK_EN (0x0020)
143 /* Single block clock disable 16bit (-/W) */
144 #define U300_SYSCON_SBCDR (0x0030)
145 /* Same values as above for SBCER */
146 /* Clock force SLOW peripherals 16bit (R/W) */
147 #define U300_SYSCON_CFSR (0x003c)
148 #define U300_SYSCON_CFSR_PPM_CLK_FORCE_EN (0x0200)
149 #define U300_SYSCON_CFSR_ACC_TMR_CLK_FORCE_EN (0x0100)
150 #define U300_SYSCON_CFSR_APP_TMR_CLK_FORCE_EN (0x0080)
151 #define U300_SYSCON_CFSR_KEYPAD_CLK_FORCE_EN (0x0020)
152 #define U300_SYSCON_CFSR_GPIO_CLK_FORCE_EN (0x0010)
153 #define U300_SYSCON_CFSR_EH_CLK_FORCE_EN (0x0008)
154 #define U300_SYSCON_CFSR_BTR_CLK_FORCE_EN (0x0004)
155 #define U300_SYSCON_CFSR_UART_CLK_FORCE_EN (0x0002)
156 #define U300_SYSCON_CFSR_SLOW_BRIDGE_CLK_FORCE_EN (0x0001)
157 /* Clock force FAST peripherals 16bit (R/W) */
158 #define U300_SYSCON_CFFR (0x40)
159 /* Values not defined. Define if you want to use them. */
160 /* Clock force the rest of the peripherals 16bit (R/W) */
161 #define U300_SYSCON_CFRR (0x44)
162 #define U300_SYSCON_CFRR_CDS_CLK_FORCE_EN (0x2000)
163 #define U300_SYSCON_CFRR_ISP_CLK_FORCE_EN (0x1000)
164 #define U300_SYSCON_CFRR_MSPRO_CLK_FORCE_EN (0x0800)
165 #define U300_SYSCON_CFRR_AHB_SUBSYS_BRIDGE_CLK_FORCE_EN (0x0400)
166 #define U300_SYSCON_CFRR_SEMI_CLK_FORCE_EN (0x0200)
167 #define U300_SYSCON_CFRR_XGAM_CLK_FORCE_EN (0x0100)
168 #define U300_SYSCON_CFRR_VIDEO_ENC_CLK_FORCE_EN (0x0080)
169 #define U300_SYSCON_CFRR_NANDIF_CLK_FORCE_EN (0x0040)
170 #define U300_SYSCON_CFRR_EMIF_CLK_FORCE_EN (0x0020)
171 #define U300_SYSCON_CFRR_DMAC_CLK_FORCE_EN (0x0010)
172 #define U300_SYSCON_CFRR_CPU_CLK_FORCE_EN (0x0008)
173 #define U300_SYSCON_CFRR_APEX_CLK_FORCE_EN (0x0004)
174 #define U300_SYSCON_CFRR_AHB_CLK_FORCE_EN (0x0002)
175 #define U300_SYSCON_CFRR_AAIF_CLK_FORCE_EN (0x0001)
176 /* PLL208 Frequency Control 16bit (R/W) */
177 #define U300_SYSCON_PFCR (0x48)
178 #define U300_SYSCON_PFCR_DPLL_MULT_NUM (0x000F)
179 /* Power Management Control 16bit (R/W) */
180 #define U300_SYSCON_PMCR (0x50)
181 #define U300_SYSCON_PMCR_DCON_ENABLE (0x0002)
182 #define U300_SYSCON_PMCR_PWR_MGNT_ENABLE (0x0001)
183 /* Reset Out 16bit (R/W) */
184 #define U300_SYSCON_RCR (0x6c)
185 #define U300_SYSCON_RCR_RESOUT0_RST_N_DISABLE (0x0001)
186 /* EMIF Slew Rate Control 16bit (R/W) */
187 #define U300_SYSCON_SRCLR (0x70)
188 #define U300_SYSCON_SRCLR_MASK (0x03FF)
189 #define U300_SYSCON_SRCLR_VALUE (0x03FF)
190 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_5_B (0x0200)
191 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_5_A (0x0100)
192 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_4_B (0x0080)
193 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_4_A (0x0040)
194 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_3_B (0x0020)
195 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_3_A (0x0010)
196 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_2_B (0x0008)
197 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_2_A (0x0004)
198 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_1_B (0x0002)
199 #define U300_SYSCON_SRCLR_EMIF_1_SLRC_1_A (0x0001)
200 /* EMIF Clock Control Register 16bit (R/W) */
201 #define U300_SYSCON_ECCR (0x0078)
202 #define U300_SYSCON_ECCR_MASK (0x000F)
203 #define U300_SYSCON_ECCR_EMIF_1_STATIC_CLK_EN_N_DISABLE (0x0008)
204 #define U300_SYSCON_ECCR_EMIF_1_RET_OUT_CLK_EN_N_DISABLE (0x0004)
205 #define U300_SYSCON_ECCR_EMIF_MEMCLK_RET_EN_N_DISABLE (0x0002)
206 #define U300_SYSCON_ECCR_EMIF_SDRCLK_RET_EN_N_DISABLE (0x0001)
207 /* MMC/MSPRO frequency divider register 0 16bit (R/W) */
208 #define U300_SYSCON_MMF0R (0x90)
209 #define U300_SYSCON_MMF0R_MASK (0x00FF)
210 #define U300_SYSCON_MMF0R_FREQ_0_HIGH_MASK (0x00F0)
211 #define U300_SYSCON_MMF0R_FREQ_0_LOW_MASK (0x000F)
212 /* MMC/MSPRO frequency divider register 1 16bit (R/W) */
213 #define U300_SYSCON_MMF1R (0x94)
214 #define U300_SYSCON_MMF1R_MASK (0x00FF)
215 #define U300_SYSCON_MMF1R_FREQ_1_HIGH_MASK (0x00F0)
216 #define U300_SYSCON_MMF1R_FREQ_1_LOW_MASK (0x000F)
217 /* Clock control for the MMC and MSPRO blocks 16bit (R/W) */
218 #define U300_SYSCON_MMCR (0x9C)
219 #define U300_SYSCON_MMCR_MASK (0x0003)
220 #define U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE (0x0002)
221 #define U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE (0x0001)
222 /* SYS_0_CLK_CONTROL first clock control 16bit (R/W) */
223 #define U300_SYSCON_S0CCR (0x120)
224 #define U300_SYSCON_S0CCR_FIELD_MASK (0x43FF)
225 #define U300_SYSCON_S0CCR_CLOCK_REQ (0x4000)
226 #define U300_SYSCON_S0CCR_CLOCK_REQ_MONITOR (0x2000)
227 #define U300_SYSCON_S0CCR_CLOCK_INV (0x0200)
228 #define U300_SYSCON_S0CCR_CLOCK_FREQ_MASK (0x01E0)
229 #define U300_SYSCON_S0CCR_CLOCK_SELECT_MASK (0x001E)
230 #define U300_SYSCON_S0CCR_CLOCK_ENABLE (0x0001)
231 #define U300_SYSCON_S0CCR_SEL_MCLK (0x8<<1)
232 #define U300_SYSCON_S0CCR_SEL_ACC_FSM_CLK (0xA<<1)
233 #define U300_SYSCON_S0CCR_SEL_PLL60_48_CLK (0xC<<1)
234 #define U300_SYSCON_S0CCR_SEL_PLL60_60_CLK (0xD<<1)
235 #define U300_SYSCON_S0CCR_SEL_ACC_PLL208_CLK (0xE<<1)
236 #define U300_SYSCON_S0CCR_SEL_APP_PLL13_CLK (0x0<<1)
237 #define U300_SYSCON_S0CCR_SEL_APP_FSM_CLK (0x2<<1)
238 #define U300_SYSCON_S0CCR_SEL_RTC_CLK (0x4<<1)
239 #define U300_SYSCON_S0CCR_SEL_APP_PLL208_CLK (0x6<<1)
240 /* SYS_1_CLK_CONTROL second clock control 16 bit (R/W) */
241 #define U300_SYSCON_S1CCR (0x124)
242 #define U300_SYSCON_S1CCR_FIELD_MASK (0x43FF)
243 #define U300_SYSCON_S1CCR_CLOCK_REQ (0x4000)
244 #define U300_SYSCON_S1CCR_CLOCK_REQ_MONITOR (0x2000)
245 #define U300_SYSCON_S1CCR_CLOCK_INV (0x0200)
246 #define U300_SYSCON_S1CCR_CLOCK_FREQ_MASK (0x01E0)
247 #define U300_SYSCON_S1CCR_CLOCK_SELECT_MASK (0x001E)
248 #define U300_SYSCON_S1CCR_CLOCK_ENABLE (0x0001)
249 #define U300_SYSCON_S1CCR_SEL_MCLK (0x8<<1)
250 #define U300_SYSCON_S1CCR_SEL_ACC_FSM_CLK (0xA<<1)
251 #define U300_SYSCON_S1CCR_SEL_PLL60_48_CLK (0xC<<1)
252 #define U300_SYSCON_S1CCR_SEL_PLL60_60_CLK (0xD<<1)
253 #define U300_SYSCON_S1CCR_SEL_ACC_PLL208_CLK (0xE<<1)
254 #define U300_SYSCON_S1CCR_SEL_ACC_PLL13_CLK (0x0<<1)
255 #define U300_SYSCON_S1CCR_SEL_APP_FSM_CLK (0x2<<1)
256 #define U300_SYSCON_S1CCR_SEL_RTC_CLK (0x4<<1)
257 #define U300_SYSCON_S1CCR_SEL_APP_PLL208_CLK (0x6<<1)
258 /* SYS_2_CLK_CONTROL third clock contol 16 bit (R/W) */
259 #define U300_SYSCON_S2CCR (0x128)
260 #define U300_SYSCON_S2CCR_FIELD_MASK (0xC3FF)
261 #define U300_SYSCON_S2CCR_CLK_STEAL (0x8000)
262 #define U300_SYSCON_S2CCR_CLOCK_REQ (0x4000)
263 #define U300_SYSCON_S2CCR_CLOCK_REQ_MONITOR (0x2000)
264 #define U300_SYSCON_S2CCR_CLOCK_INV (0x0200)
265 #define U300_SYSCON_S2CCR_CLOCK_FREQ_MASK (0x01E0)
266 #define U300_SYSCON_S2CCR_CLOCK_SELECT_MASK (0x001E)
267 #define U300_SYSCON_S2CCR_CLOCK_ENABLE (0x0001)
268 #define U300_SYSCON_S2CCR_SEL_MCLK (0x8<<1)
269 #define U300_SYSCON_S2CCR_SEL_ACC_FSM_CLK (0xA<<1)
270 #define U300_SYSCON_S2CCR_SEL_PLL60_48_CLK (0xC<<1)
271 #define U300_SYSCON_S2CCR_SEL_PLL60_60_CLK (0xD<<1)
272 #define U300_SYSCON_S2CCR_SEL_ACC_PLL208_CLK (0xE<<1)
273 #define U300_SYSCON_S2CCR_SEL_ACC_PLL13_CLK (0x0<<1)
274 #define U300_SYSCON_S2CCR_SEL_APP_FSM_CLK (0x2<<1)
275 #define U300_SYSCON_S2CCR_SEL_RTC_CLK (0x4<<1)
276 #define U300_SYSCON_S2CCR_SEL_APP_PLL208_CLK (0x6<<1)
277 /* SC_PLL_IRQ_CONTROL 16bit (R/W) */
278 #define U300_SYSCON_PICR (0x0130)
279 #define U300_SYSCON_PICR_MASK (0x00FF)
280 #define U300_SYSCON_PICR_FORCE_PLL208_LOCK_LOW_ENABLE (0x0080)
281 #define U300_SYSCON_PICR_FORCE_PLL208_LOCK_HIGH_ENABLE (0x0040)
282 #define U300_SYSCON_PICR_FORCE_PLL13_LOCK_LOW_ENABLE (0x0020)
283 #define U300_SYSCON_PICR_FORCE_PLL13_LOCK_HIGH_ENABLE (0x0010)
284 #define U300_SYSCON_PICR_IRQMASK_PLL13_UNLOCK_ENABLE (0x0008)
285 #define U300_SYSCON_PICR_IRQMASK_PLL13_LOCK_ENABLE (0x0004)
286 #define U300_SYSCON_PICR_IRQMASK_PLL208_UNLOCK_ENABLE (0x0002)
287 #define U300_SYSCON_PICR_IRQMASK_PLL208_LOCK_ENABLE (0x0001)
288 /* SC_PLL_IRQ_STATUS 16 bit (R/-) */
289 #define U300_SYSCON_PISR (0x0134)
290 #define U300_SYSCON_PISR_MASK (0x000F)
291 #define U300_SYSCON_PISR_PLL13_UNLOCK_IND (0x0008)
292 #define U300_SYSCON_PISR_PLL13_LOCK_IND (0x0004)
293 #define U300_SYSCON_PISR_PLL208_UNLOCK_IND (0x0002)
294 #define U300_SYSCON_PISR_PLL208_LOCK_IND (0x0001)
295 /* SC_PLL_IRQ_CLEAR 16 bit (-/W) */
296 #define U300_SYSCON_PICLR (0x0138)
297 #define U300_SYSCON_PICLR_MASK (0x000F)
298 #define U300_SYSCON_PICLR_RWMASK (0x0000)
299 #define U300_SYSCON_PICLR_PLL13_UNLOCK_SC (0x0008)
300 #define U300_SYSCON_PICLR_PLL13_LOCK_SC (0x0004)
301 #define U300_SYSCON_PICLR_PLL208_UNLOCK_SC (0x0002)
302 #define U300_SYSCON_PICLR_PLL208_LOCK_SC (0x0001)
303 /* Clock activity observability register 0 */
304 #define U300_SYSCON_C0OAR (0x140)
305 #define U300_SYSCON_C0OAR_MASK (0xFFFF)
306 #define U300_SYSCON_C0OAR_VALUE (0xFFFF)
307 #define U300_SYSCON_C0OAR_BT_H_CLK (0x8000)
308 #define U300_SYSCON_C0OAR_ASPB_P_CLK (0x4000)
309 #define U300_SYSCON_C0OAR_APP_SEMI_H_CLK (0x2000)
310 #define U300_SYSCON_C0OAR_APP_SEMI_CLK (0x1000)
311 #define U300_SYSCON_C0OAR_APP_MMC_MSPRO_CLK (0x0800)
312 #define U300_SYSCON_C0OAR_APP_I2S1_CLK (0x0400)
313 #define U300_SYSCON_C0OAR_APP_I2S0_CLK (0x0200)
314 #define U300_SYSCON_C0OAR_APP_CPU_CLK (0x0100)
315 #define U300_SYSCON_C0OAR_APP_52_CLK (0x0080)
316 #define U300_SYSCON_C0OAR_APP_208_CLK (0x0040)
317 #define U300_SYSCON_C0OAR_APP_104_CLK (0x0020)
318 #define U300_SYSCON_C0OAR_APEX_CLK (0x0010)
319 #define U300_SYSCON_C0OAR_AHPB_M_H_CLK (0x0008)
320 #define U300_SYSCON_C0OAR_AHB_CLK (0x0004)
321 #define U300_SYSCON_C0OAR_AFPB_P_CLK (0x0002)
322 #define U300_SYSCON_C0OAR_AAIF_CLK (0x0001)
323 /* Clock activity observability register 1 */
324 #define U300_SYSCON_C1OAR (0x144)
325 #define U300_SYSCON_C1OAR_MASK (0x3FFE)
326 #define U300_SYSCON_C1OAR_VALUE (0x3FFE)
327 #define U300_SYSCON_C1OAR_NFIF_F_CLK (0x2000)
328 #define U300_SYSCON_C1OAR_MSPRO_CLK (0x1000)
329 #define U300_SYSCON_C1OAR_MMC_P_CLK (0x0800)
330 #define U300_SYSCON_C1OAR_MMC_CLK (0x0400)
331 #define U300_SYSCON_C1OAR_KP_P_CLK (0x0200)
332 #define U300_SYSCON_C1OAR_I2C1_P_CLK (0x0100)
333 #define U300_SYSCON_C1OAR_I2C0_P_CLK (0x0080)
334 #define U300_SYSCON_C1OAR_GPIO_CLK (0x0040)
335 #define U300_SYSCON_C1OAR_EMIF_MPMC_CLK (0x0020)
336 #define U300_SYSCON_C1OAR_EMIF_H_CLK (0x0010)
337 #define U300_SYSCON_C1OAR_EVHIST_CLK (0x0008)
338 #define U300_SYSCON_C1OAR_PPM_CLK (0x0004)
339 #define U300_SYSCON_C1OAR_DMA_CLK (0x0002)
340 /* Clock activity observability register 2 */
341 #define U300_SYSCON_C2OAR (0x148)
342 #define U300_SYSCON_C2OAR_MASK (0x0FFF)
343 #define U300_SYSCON_C2OAR_VALUE (0x0FFF)
344 #define U300_SYSCON_C2OAR_XGAM_CDI_CLK (0x0800)
345 #define U300_SYSCON_C2OAR_XGAM_CLK (0x0400)
346 #define U300_SYSCON_C2OAR_VC_H_CLK (0x0200)
347 #define U300_SYSCON_C2OAR_VC_CLK (0x0100)
348 #define U300_SYSCON_C2OAR_UA_P_CLK (0x0080)
349 #define U300_SYSCON_C2OAR_TMR1_CLK (0x0040)
350 #define U300_SYSCON_C2OAR_TMR0_CLK (0x0020)
351 #define U300_SYSCON_C2OAR_SPI_P_CLK (0x0010)
352 #define U300_SYSCON_C2OAR_PCM_I2S1_CORE_CLK (0x0008)
353 #define U300_SYSCON_C2OAR_PCM_I2S1_CLK (0x0004)
354 #define U300_SYSCON_C2OAR_PCM_I2S0_CORE_CLK (0x0002)
355 #define U300_SYSCON_C2OAR_PCM_I2S0_CLK (0x0001)
356
357
358 /*
359 * The clocking hierarchy currently looks like this.
360 * NOTE: the idea is NOT to show how the clocks are routed on the chip!
361 * The ideas is to show dependencies, so a clock higher up in the
362 * hierarchy has to be on in order for another clock to be on. Now,
363 * both CPU and DMA can actually be on top of the hierarchy, and that
364 * is not modeled currently. Instead we have the backbone AMBA bus on
365 * top. This bus cannot be programmed in any way but conceptually it
366 * needs to be active for the bridges and devices to transport data.
367 *
368 * Please be aware that a few clocks are hw controlled, which mean that
369 * the hw itself can turn on/off or change the rate of the clock when
370 * needed!
371 *
372 * AMBA bus
373 * |
374 * +- CPU
375 * +- FSMC NANDIF NAND Flash interface
376 * +- SEMI Shared Memory interface
377 * +- ISP Image Signal Processor (U335 only)
378 * +- CDS (U335 only)
379 * +- DMA Direct Memory Access Controller
380 * +- AAIF APP/ACC Inteface (Mobile Scalable Link, MSL)
381 * +- APEX
382 * +- VIDEO_ENC AVE2/3 Video Encoder
383 * +- XGAM Graphics Accelerator Controller
384 * +- AHB
385 * |
386 * +- ahb:0 AHB Bridge
387 * | |
388 * | +- ahb:1 INTCON Interrupt controller
389 * | +- ahb:3 MSPRO Memory Stick Pro controller
390 * | +- ahb:4 EMIF External Memory interface
391 * |
392 * +- fast:0 FAST bridge
393 * | |
394 * | +- fast:1 MMCSD MMC/SD card reader controller
395 * | +- fast:2 I2S0 PCM I2S channel 0 controller
396 * | +- fast:3 I2S1 PCM I2S channel 1 controller
397 * | +- fast:4 I2C0 I2C channel 0 controller
398 * | +- fast:5 I2C1 I2C channel 1 controller
399 * | +- fast:6 SPI SPI controller
400 * | +- fast:7 UART1 Secondary UART (U335 only)
401 * |
402 * +- slow:0 SLOW bridge
403 * |
404 * +- slow:1 SYSCON (not possible to control)
405 * +- slow:2 WDOG Watchdog
406 * +- slow:3 UART0 primary UART
407 * +- slow:4 TIMER_APP Application timer - used in Linux
408 * +- slow:5 KEYPAD controller
409 * +- slow:6 GPIO controller
410 * +- slow:7 RTC controller
411 * +- slow:8 BT Bus Tracer (not used currently)
412 * +- slow:9 EH Event Handler (not used currently)
413 * +- slow:a TIMER_ACC Access style timer (not used currently)
414 * +- slow:b PPM (U335 only, what is that?)
415 */
416
417 /* Global syscon virtual base */
418 static void __iomem *syscon_vbase;
419
420 /**
421 * struct clk_syscon - U300 syscon clock
422 * @hw: corresponding clock hardware entry
423 * @hw_ctrld: whether this clock is hardware controlled (for refcount etc)
424 * and does not need any magic pokes to be enabled/disabled
425 * @reset: state holder, whether this block's reset line is asserted or not
426 * @res_reg: reset line enable/disable flag register
427 * @res_bit: bit for resetting or taking this consumer out of reset
428 * @en_reg: clock line enable/disable flag register
429 * @en_bit: bit for enabling/disabling this consumer clock line
430 * @clk_val: magic value to poke in the register to enable/disable
431 * this one clock
432 */
433 struct clk_syscon {
434 struct clk_hw hw;
435 bool hw_ctrld;
436 bool reset;
437 void __iomem *res_reg;
438 u8 res_bit;
439 void __iomem *en_reg;
440 u8 en_bit;
441 u16 clk_val;
442 };
443
444 #define to_syscon(_hw) container_of(_hw, struct clk_syscon, hw)
445
446 static DEFINE_SPINLOCK(syscon_resetreg_lock);
447
448 /*
449 * Reset control functions. We remember if a block has been
450 * taken out of reset and don't remove the reset assertion again
451 * and vice versa. Currently we only remove resets so the
452 * enablement function is defined out.
453 */
454 static void syscon_block_reset_enable(struct clk_syscon *sclk)
455 {
456 unsigned long iflags;
457 u16 val;
458
459 /* Not all blocks support resetting */
460 if (!sclk->res_reg)
461 return;
462 spin_lock_irqsave(&syscon_resetreg_lock, iflags);
463 val = readw(sclk->res_reg);
464 val |= BIT(sclk->res_bit);
465 writew(val, sclk->res_reg);
466 spin_unlock_irqrestore(&syscon_resetreg_lock, iflags);
467 sclk->reset = true;
468 }
469
470 static void syscon_block_reset_disable(struct clk_syscon *sclk)
471 {
472 unsigned long iflags;
473 u16 val;
474
475 /* Not all blocks support resetting */
476 if (!sclk->res_reg)
477 return;
478 spin_lock_irqsave(&syscon_resetreg_lock, iflags);
479 val = readw(sclk->res_reg);
480 val &= ~BIT(sclk->res_bit);
481 writew(val, sclk->res_reg);
482 spin_unlock_irqrestore(&syscon_resetreg_lock, iflags);
483 sclk->reset = false;
484 }
485
486 static int syscon_clk_prepare(struct clk_hw *hw)
487 {
488 struct clk_syscon *sclk = to_syscon(hw);
489
490 /* If the block is in reset, bring it out */
491 if (sclk->reset)
492 syscon_block_reset_disable(sclk);
493 return 0;
494 }
495
496 static void syscon_clk_unprepare(struct clk_hw *hw)
497 {
498 struct clk_syscon *sclk = to_syscon(hw);
499
500 /* Please don't force the console into reset */
501 if (sclk->clk_val == U300_SYSCON_SBCER_UART_CLK_EN)
502 return;
503 /* When unpreparing, force block into reset */
504 if (!sclk->reset)
505 syscon_block_reset_enable(sclk);
506 }
507
508 static int syscon_clk_enable(struct clk_hw *hw)
509 {
510 struct clk_syscon *sclk = to_syscon(hw);
511
512 /* Don't touch the hardware controlled clocks */
513 if (sclk->hw_ctrld)
514 return 0;
515 /* These cannot be controlled */
516 if (sclk->clk_val == 0xFFFFU)
517 return 0;
518
519 writew(sclk->clk_val, syscon_vbase + U300_SYSCON_SBCER);
520 return 0;
521 }
522
523 static void syscon_clk_disable(struct clk_hw *hw)
524 {
525 struct clk_syscon *sclk = to_syscon(hw);
526
527 /* Don't touch the hardware controlled clocks */
528 if (sclk->hw_ctrld)
529 return;
530 if (sclk->clk_val == 0xFFFFU)
531 return;
532 /* Please don't disable the console port */
533 if (sclk->clk_val == U300_SYSCON_SBCER_UART_CLK_EN)
534 return;
535
536 writew(sclk->clk_val, syscon_vbase + U300_SYSCON_SBCDR);
537 }
538
539 static int syscon_clk_is_enabled(struct clk_hw *hw)
540 {
541 struct clk_syscon *sclk = to_syscon(hw);
542 u16 val;
543
544 /* If no enable register defined, it's always-on */
545 if (!sclk->en_reg)
546 return 1;
547
548 val = readw(sclk->en_reg);
549 val &= BIT(sclk->en_bit);
550
551 return val ? 1 : 0;
552 }
553
554 static u16 syscon_get_perf(void)
555 {
556 u16 val;
557
558 val = readw(syscon_vbase + U300_SYSCON_CCR);
559 val &= U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
560 return val;
561 }
562
563 static unsigned long
564 syscon_clk_recalc_rate(struct clk_hw *hw,
565 unsigned long parent_rate)
566 {
567 struct clk_syscon *sclk = to_syscon(hw);
568 u16 perf = syscon_get_perf();
569
570 switch(sclk->clk_val) {
571 case U300_SYSCON_SBCER_FAST_BRIDGE_CLK_EN:
572 case U300_SYSCON_SBCER_I2C0_CLK_EN:
573 case U300_SYSCON_SBCER_I2C1_CLK_EN:
574 case U300_SYSCON_SBCER_MMC_CLK_EN:
575 case U300_SYSCON_SBCER_SPI_CLK_EN:
576 /* The FAST clocks have one progression */
577 switch(perf) {
578 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
579 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
580 return 13000000;
581 default:
582 return parent_rate; /* 26 MHz */
583 }
584 case U300_SYSCON_SBCER_DMAC_CLK_EN:
585 case U300_SYSCON_SBCER_NANDIF_CLK_EN:
586 case U300_SYSCON_SBCER_XGAM_CLK_EN:
587 /* AMBA interconnect peripherals */
588 switch(perf) {
589 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
590 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
591 return 6500000;
592 case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
593 return 26000000;
594 default:
595 return parent_rate; /* 52 MHz */
596 }
597 case U300_SYSCON_SBCER_SEMI_CLK_EN:
598 case U300_SYSCON_SBCER_EMIF_CLK_EN:
599 /* EMIF speeds */
600 switch(perf) {
601 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
602 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
603 return 13000000;
604 case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
605 return 52000000;
606 default:
607 return 104000000;
608 }
609 case U300_SYSCON_SBCER_CPU_CLK_EN:
610 /* And the fast CPU clock */
611 switch(perf) {
612 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
613 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
614 return 13000000;
615 case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
616 return 52000000;
617 case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
618 return 104000000;
619 default:
620 return parent_rate; /* 208 MHz */
621 }
622 default:
623 /*
624 * The SLOW clocks and default just inherit the rate of
625 * their parent (typically PLL13 13 MHz).
626 */
627 return parent_rate;
628 }
629 }
630
631 static long
632 syscon_clk_round_rate(struct clk_hw *hw, unsigned long rate,
633 unsigned long *prate)
634 {
635 struct clk_syscon *sclk = to_syscon(hw);
636
637 if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN)
638 return *prate;
639 /* We really only support setting the rate of the CPU clock */
640 if (rate <= 13000000)
641 return 13000000;
642 if (rate <= 52000000)
643 return 52000000;
644 if (rate <= 104000000)
645 return 104000000;
646 return 208000000;
647 }
648
649 static int syscon_clk_set_rate(struct clk_hw *hw, unsigned long rate,
650 unsigned long parent_rate)
651 {
652 struct clk_syscon *sclk = to_syscon(hw);
653 u16 val;
654
655 /* We only support setting the rate of the CPU clock */
656 if (sclk->clk_val != U300_SYSCON_SBCER_CPU_CLK_EN)
657 return -EINVAL;
658 switch (rate) {
659 case 13000000:
660 val = U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER;
661 break;
662 case 52000000:
663 val = U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE;
664 break;
665 case 104000000:
666 val = U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH;
667 break;
668 case 208000000:
669 val = U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST;
670 break;
671 default:
672 return -EINVAL;
673 }
674 val |= readw(syscon_vbase + U300_SYSCON_CCR) &
675 ~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK ;
676 writew(val, syscon_vbase + U300_SYSCON_CCR);
677 return 0;
678 }
679
680 static const struct clk_ops syscon_clk_ops = {
681 .prepare = syscon_clk_prepare,
682 .unprepare = syscon_clk_unprepare,
683 .enable = syscon_clk_enable,
684 .disable = syscon_clk_disable,
685 .is_enabled = syscon_clk_is_enabled,
686 .recalc_rate = syscon_clk_recalc_rate,
687 .round_rate = syscon_clk_round_rate,
688 .set_rate = syscon_clk_set_rate,
689 };
690
691 static struct clk * __init
692 syscon_clk_register(struct device *dev, const char *name,
693 const char *parent_name, unsigned long flags,
694 bool hw_ctrld,
695 void __iomem *res_reg, u8 res_bit,
696 void __iomem *en_reg, u8 en_bit,
697 u16 clk_val)
698 {
699 struct clk *clk;
700 struct clk_syscon *sclk;
701 struct clk_init_data init;
702
703 sclk = kzalloc(sizeof(struct clk_syscon), GFP_KERNEL);
704 if (!sclk) {
705 pr_err("could not allocate syscon clock %s\n",
706 name);
707 return ERR_PTR(-ENOMEM);
708 }
709 init.name = name;
710 init.ops = &syscon_clk_ops;
711 init.flags = flags;
712 init.parent_names = (parent_name ? &parent_name : NULL);
713 init.num_parents = (parent_name ? 1 : 0);
714 sclk->hw.init = &init;
715 sclk->hw_ctrld = hw_ctrld;
716 /* Assume the block is in reset at registration */
717 sclk->reset = true;
718 sclk->res_reg = res_reg;
719 sclk->res_bit = res_bit;
720 sclk->en_reg = en_reg;
721 sclk->en_bit = en_bit;
722 sclk->clk_val = clk_val;
723
724 clk = clk_register(dev, &sclk->hw);
725 if (IS_ERR(clk))
726 kfree(sclk);
727
728 return clk;
729 }
730
731 #define U300_CLK_TYPE_SLOW 0
732 #define U300_CLK_TYPE_FAST 1
733 #define U300_CLK_TYPE_REST 2
734
735 /**
736 * struct u300_clock - defines the bits and pieces for a certain clock
737 * @type: the clock type, slow fast or rest
738 * @id: the bit in the slow/fast/rest register for this clock
739 * @hw_ctrld: whether the clock is hardware controlled
740 * @clk_val: a value to poke in the one-write enable/disable registers
741 */
742 struct u300_clock {
743 u8 type;
744 u8 id;
745 bool hw_ctrld;
746 u16 clk_val;
747 };
748
749 static struct u300_clock const u300_clk_lookup[] __initconst = {
750 {
751 .type = U300_CLK_TYPE_REST,
752 .id = 3,
753 .hw_ctrld = true,
754 .clk_val = U300_SYSCON_SBCER_CPU_CLK_EN,
755 },
756 {
757 .type = U300_CLK_TYPE_REST,
758 .id = 4,
759 .hw_ctrld = true,
760 .clk_val = U300_SYSCON_SBCER_DMAC_CLK_EN,
761 },
762 {
763 .type = U300_CLK_TYPE_REST,
764 .id = 5,
765 .hw_ctrld = false,
766 .clk_val = U300_SYSCON_SBCER_EMIF_CLK_EN,
767 },
768 {
769 .type = U300_CLK_TYPE_REST,
770 .id = 6,
771 .hw_ctrld = false,
772 .clk_val = U300_SYSCON_SBCER_NANDIF_CLK_EN,
773 },
774 {
775 .type = U300_CLK_TYPE_REST,
776 .id = 8,
777 .hw_ctrld = true,
778 .clk_val = U300_SYSCON_SBCER_XGAM_CLK_EN,
779 },
780 {
781 .type = U300_CLK_TYPE_REST,
782 .id = 9,
783 .hw_ctrld = false,
784 .clk_val = U300_SYSCON_SBCER_SEMI_CLK_EN,
785 },
786 {
787 .type = U300_CLK_TYPE_REST,
788 .id = 10,
789 .hw_ctrld = true,
790 .clk_val = U300_SYSCON_SBCER_AHB_SUBSYS_BRIDGE_CLK_EN,
791 },
792 {
793 .type = U300_CLK_TYPE_REST,
794 .id = 12,
795 .hw_ctrld = false,
796 /* INTCON: cannot be enabled, just taken out of reset */
797 .clk_val = 0xFFFFU,
798 },
799 {
800 .type = U300_CLK_TYPE_FAST,
801 .id = 0,
802 .hw_ctrld = true,
803 .clk_val = U300_SYSCON_SBCER_FAST_BRIDGE_CLK_EN,
804 },
805 {
806 .type = U300_CLK_TYPE_FAST,
807 .id = 1,
808 .hw_ctrld = false,
809 .clk_val = U300_SYSCON_SBCER_I2C0_CLK_EN,
810 },
811 {
812 .type = U300_CLK_TYPE_FAST,
813 .id = 2,
814 .hw_ctrld = false,
815 .clk_val = U300_SYSCON_SBCER_I2C1_CLK_EN,
816 },
817 {
818 .type = U300_CLK_TYPE_FAST,
819 .id = 5,
820 .hw_ctrld = false,
821 .clk_val = U300_SYSCON_SBCER_MMC_CLK_EN,
822 },
823 {
824 .type = U300_CLK_TYPE_FAST,
825 .id = 6,
826 .hw_ctrld = false,
827 .clk_val = U300_SYSCON_SBCER_SPI_CLK_EN,
828 },
829 {
830 .type = U300_CLK_TYPE_SLOW,
831 .id = 0,
832 .hw_ctrld = true,
833 .clk_val = U300_SYSCON_SBCER_SLOW_BRIDGE_CLK_EN,
834 },
835 {
836 .type = U300_CLK_TYPE_SLOW,
837 .id = 1,
838 .hw_ctrld = false,
839 .clk_val = U300_SYSCON_SBCER_UART_CLK_EN,
840 },
841 {
842 .type = U300_CLK_TYPE_SLOW,
843 .id = 4,
844 .hw_ctrld = false,
845 .clk_val = U300_SYSCON_SBCER_GPIO_CLK_EN,
846 },
847 {
848 .type = U300_CLK_TYPE_SLOW,
849 .id = 6,
850 .hw_ctrld = true,
851 /* No clock enable register bit */
852 .clk_val = 0xFFFFU,
853 },
854 {
855 .type = U300_CLK_TYPE_SLOW,
856 .id = 7,
857 .hw_ctrld = false,
858 .clk_val = U300_SYSCON_SBCER_APP_TMR_CLK_EN,
859 },
860 {
861 .type = U300_CLK_TYPE_SLOW,
862 .id = 8,
863 .hw_ctrld = false,
864 .clk_val = U300_SYSCON_SBCER_ACC_TMR_CLK_EN,
865 },
866 };
867
868 static void __init of_u300_syscon_clk_init(struct device_node *np)
869 {
870 struct clk *clk = ERR_PTR(-EINVAL);
871 const char *clk_name = np->name;
872 const char *parent_name;
873 void __iomem *res_reg;
874 void __iomem *en_reg;
875 u32 clk_type;
876 u32 clk_id;
877 int i;
878
879 if (of_property_read_u32(np, "clock-type", &clk_type)) {
880 pr_err("%s: syscon clock \"%s\" missing clock-type property\n",
881 __func__, clk_name);
882 return;
883 }
884 if (of_property_read_u32(np, "clock-id", &clk_id)) {
885 pr_err("%s: syscon clock \"%s\" missing clock-id property\n",
886 __func__, clk_name);
887 return;
888 }
889 parent_name = of_clk_get_parent_name(np, 0);
890
891 switch (clk_type) {
892 case U300_CLK_TYPE_SLOW:
893 res_reg = syscon_vbase + U300_SYSCON_RSR;
894 en_reg = syscon_vbase + U300_SYSCON_CESR;
895 break;
896 case U300_CLK_TYPE_FAST:
897 res_reg = syscon_vbase + U300_SYSCON_RFR;
898 en_reg = syscon_vbase + U300_SYSCON_CEFR;
899 break;
900 case U300_CLK_TYPE_REST:
901 res_reg = syscon_vbase + U300_SYSCON_RRR;
902 en_reg = syscon_vbase + U300_SYSCON_CERR;
903 break;
904 default:
905 pr_err("unknown clock type %x specified\n", clk_type);
906 return;
907 }
908
909 for (i = 0; i < ARRAY_SIZE(u300_clk_lookup); i++) {
910 const struct u300_clock *u3clk = &u300_clk_lookup[i];
911
912 if (u3clk->type == clk_type && u3clk->id == clk_id)
913 clk = syscon_clk_register(NULL,
914 clk_name, parent_name,
915 0, u3clk->hw_ctrld,
916 res_reg, u3clk->id,
917 en_reg, u3clk->id,
918 u3clk->clk_val);
919 }
920
921 if (!IS_ERR(clk)) {
922 of_clk_add_provider(np, of_clk_src_simple_get, clk);
923
924 /*
925 * Some few system clocks - device tree does not
926 * represent clocks without a corresponding device node.
927 * for now we add these three clocks here.
928 */
929 if (clk_type == U300_CLK_TYPE_REST && clk_id == 5)
930 clk_register_clkdev(clk, NULL, "pl172");
931 if (clk_type == U300_CLK_TYPE_REST && clk_id == 9)
932 clk_register_clkdev(clk, NULL, "semi");
933 if (clk_type == U300_CLK_TYPE_REST && clk_id == 12)
934 clk_register_clkdev(clk, NULL, "intcon");
935 }
936 }
937
938 /**
939 * struct clk_mclk - U300 MCLK clock (MMC/SD clock)
940 * @hw: corresponding clock hardware entry
941 * @is_mspro: if this is the memory stick clock rather than MMC/SD
942 */
943 struct clk_mclk {
944 struct clk_hw hw;
945 bool is_mspro;
946 };
947
948 #define to_mclk(_hw) container_of(_hw, struct clk_mclk, hw)
949
950 static int mclk_clk_prepare(struct clk_hw *hw)
951 {
952 struct clk_mclk *mclk = to_mclk(hw);
953 u16 val;
954
955 /* The MMC and MSPRO clocks need some special set-up */
956 if (!mclk->is_mspro) {
957 /* Set default MMC clock divisor to 18.9 MHz */
958 writew(0x0054U, syscon_vbase + U300_SYSCON_MMF0R);
959 val = readw(syscon_vbase + U300_SYSCON_MMCR);
960 /* Disable the MMC feedback clock */
961 val &= ~U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE;
962 /* Disable MSPRO frequency */
963 val &= ~U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE;
964 writew(val, syscon_vbase + U300_SYSCON_MMCR);
965 } else {
966 val = readw(syscon_vbase + U300_SYSCON_MMCR);
967 /* Disable the MMC feedback clock */
968 val &= ~U300_SYSCON_MMCR_MMC_FB_CLK_SEL_ENABLE;
969 /* Enable MSPRO frequency */
970 val |= U300_SYSCON_MMCR_MSPRO_FREQSEL_ENABLE;
971 writew(val, syscon_vbase + U300_SYSCON_MMCR);
972 }
973
974 return 0;
975 }
976
977 static unsigned long
978 mclk_clk_recalc_rate(struct clk_hw *hw,
979 unsigned long parent_rate)
980 {
981 u16 perf = syscon_get_perf();
982
983 switch (perf) {
984 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW_POWER:
985 /*
986 * Here, the 208 MHz PLL gets shut down and the always
987 * on 13 MHz PLL used for RTC etc kicks into use
988 * instead.
989 */
990 return 13000000;
991 case U300_SYSCON_CCR_CLKING_PERFORMANCE_LOW:
992 case U300_SYSCON_CCR_CLKING_PERFORMANCE_INTERMEDIATE:
993 case U300_SYSCON_CCR_CLKING_PERFORMANCE_HIGH:
994 case U300_SYSCON_CCR_CLKING_PERFORMANCE_BEST:
995 {
996 /*
997 * This clock is under program control. The register is
998 * divided in two nybbles, bit 7-4 gives cycles-1 to count
999 * high, bit 3-0 gives cycles-1 to count low. Distribute
1000 * these with no more than 1 cycle difference between
1001 * low and high and add low and high to get the actual
1002 * divisor. The base PLL is 208 MHz. Writing 0x00 will
1003 * divide by 1 and 1 so the highest frequency possible
1004 * is 104 MHz.
1005 *
1006 * e.g. 0x54 =>
1007 * f = 208 / ((5+1) + (4+1)) = 208 / 11 = 18.9 MHz
1008 */
1009 u16 val = readw(syscon_vbase + U300_SYSCON_MMF0R) &
1010 U300_SYSCON_MMF0R_MASK;
1011 switch (val) {
1012 case 0x0054:
1013 return 18900000;
1014 case 0x0044:
1015 return 20800000;
1016 case 0x0043:
1017 return 23100000;
1018 case 0x0033:
1019 return 26000000;
1020 case 0x0032:
1021 return 29700000;
1022 case 0x0022:
1023 return 34700000;
1024 case 0x0021:
1025 return 41600000;
1026 case 0x0011:
1027 return 52000000;
1028 case 0x0000:
1029 return 104000000;
1030 default:
1031 break;
1032 }
1033 }
1034 default:
1035 break;
1036 }
1037 return parent_rate;
1038 }
1039
1040 static long
1041 mclk_clk_round_rate(struct clk_hw *hw, unsigned long rate,
1042 unsigned long *prate)
1043 {
1044 if (rate <= 18900000)
1045 return 18900000;
1046 if (rate <= 20800000)
1047 return 20800000;
1048 if (rate <= 23100000)
1049 return 23100000;
1050 if (rate <= 26000000)
1051 return 26000000;
1052 if (rate <= 29700000)
1053 return 29700000;
1054 if (rate <= 34700000)
1055 return 34700000;
1056 if (rate <= 41600000)
1057 return 41600000;
1058 /* Highest rate */
1059 return 52000000;
1060 }
1061
1062 static int mclk_clk_set_rate(struct clk_hw *hw, unsigned long rate,
1063 unsigned long parent_rate)
1064 {
1065 u16 val;
1066 u16 reg;
1067
1068 switch (rate) {
1069 case 18900000:
1070 val = 0x0054;
1071 break;
1072 case 20800000:
1073 val = 0x0044;
1074 break;
1075 case 23100000:
1076 val = 0x0043;
1077 break;
1078 case 26000000:
1079 val = 0x0033;
1080 break;
1081 case 29700000:
1082 val = 0x0032;
1083 break;
1084 case 34700000:
1085 val = 0x0022;
1086 break;
1087 case 41600000:
1088 val = 0x0021;
1089 break;
1090 case 52000000:
1091 val = 0x0011;
1092 break;
1093 case 104000000:
1094 val = 0x0000;
1095 break;
1096 default:
1097 return -EINVAL;
1098 }
1099
1100 reg = readw(syscon_vbase + U300_SYSCON_MMF0R) &
1101 ~U300_SYSCON_MMF0R_MASK;
1102 writew(reg | val, syscon_vbase + U300_SYSCON_MMF0R);
1103 return 0;
1104 }
1105
1106 static const struct clk_ops mclk_ops = {
1107 .prepare = mclk_clk_prepare,
1108 .recalc_rate = mclk_clk_recalc_rate,
1109 .round_rate = mclk_clk_round_rate,
1110 .set_rate = mclk_clk_set_rate,
1111 };
1112
1113 static struct clk * __init
1114 mclk_clk_register(struct device *dev, const char *name,
1115 const char *parent_name, bool is_mspro)
1116 {
1117 struct clk *clk;
1118 struct clk_mclk *mclk;
1119 struct clk_init_data init;
1120
1121 mclk = kzalloc(sizeof(struct clk_mclk), GFP_KERNEL);
1122 if (!mclk) {
1123 pr_err("could not allocate MMC/SD clock %s\n",
1124 name);
1125 return ERR_PTR(-ENOMEM);
1126 }
1127 init.name = "mclk";
1128 init.ops = &mclk_ops;
1129 init.flags = 0;
1130 init.parent_names = (parent_name ? &parent_name : NULL);
1131 init.num_parents = (parent_name ? 1 : 0);
1132 mclk->hw.init = &init;
1133 mclk->is_mspro = is_mspro;
1134
1135 clk = clk_register(dev, &mclk->hw);
1136 if (IS_ERR(clk))
1137 kfree(mclk);
1138
1139 return clk;
1140 }
1141
1142 static void __init of_u300_syscon_mclk_init(struct device_node *np)
1143 {
1144 struct clk *clk = ERR_PTR(-EINVAL);
1145 const char *clk_name = np->name;
1146 const char *parent_name;
1147
1148 parent_name = of_clk_get_parent_name(np, 0);
1149 clk = mclk_clk_register(NULL, clk_name, parent_name, false);
1150 if (!IS_ERR(clk))
1151 of_clk_add_provider(np, of_clk_src_simple_get, clk);
1152 }
1153
1154 static const struct of_device_id u300_clk_match[] __initconst = {
1155 {
1156 .compatible = "fixed-clock",
1157 .data = of_fixed_clk_setup,
1158 },
1159 {
1160 .compatible = "fixed-factor-clock",
1161 .data = of_fixed_factor_clk_setup,
1162 },
1163 {
1164 .compatible = "stericsson,u300-syscon-clk",
1165 .data = of_u300_syscon_clk_init,
1166 },
1167 {
1168 .compatible = "stericsson,u300-syscon-mclk",
1169 .data = of_u300_syscon_mclk_init,
1170 },
1171 };
1172
1173
1174 void __init u300_clk_init(void __iomem *base)
1175 {
1176 u16 val;
1177
1178 syscon_vbase = base;
1179
1180 /* Set system to run at PLL208, max performance, a known state. */
1181 val = readw(syscon_vbase + U300_SYSCON_CCR);
1182 val &= ~U300_SYSCON_CCR_CLKING_PERFORMANCE_MASK;
1183 writew(val, syscon_vbase + U300_SYSCON_CCR);
1184 /* Wait for the PLL208 to lock if not locked in yet */
1185 while (!(readw(syscon_vbase + U300_SYSCON_CSR) &
1186 U300_SYSCON_CSR_PLL208_LOCK_IND));
1187
1188 /* Power management enable */
1189 val = readw(syscon_vbase + U300_SYSCON_PMCR);
1190 val |= U300_SYSCON_PMCR_PWR_MGNT_ENABLE;
1191 writew(val, syscon_vbase + U300_SYSCON_PMCR);
1192
1193 of_clk_init(u300_clk_match);
1194 }
Linux kernel - Deliverables
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