V S Ramanjaneya Kumar T | 713be57 | 2013-08-02 11:00:10 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2013, The Linux Foundation. All rights reserved. |
| 2 | * |
| 3 | * Redistribution and use in source and binary forms, with or without |
| 4 | * modification, are permitted provided that the following conditions are |
| 5 | * met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above |
| 9 | * copyright notice, this list of conditions and the following |
| 10 | * disclaimer in the documentation and/or other materials provided |
| 11 | * with the distribution. |
| 12 | * * Neither the name of The Linux Foundation nor the names of its |
| 13 | * contributors may be used to endorse or promote products derived |
| 14 | * from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 23 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 25 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 26 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <err.h> |
| 30 | #include <assert.h> |
| 31 | #include <debug.h> |
| 32 | #include <reg.h> |
| 33 | #include <platform/timer.h> |
| 34 | #include <platform/iomap.h> |
| 35 | #include <mmc.h> |
| 36 | #include <clock.h> |
| 37 | #include <platform/clock.h> |
| 38 | #include <blsp_qup.h> |
| 39 | |
| 40 | void hsusb_clock_init(void) |
| 41 | { |
| 42 | int ret; |
| 43 | struct clk *iclk, *cclk; |
| 44 | |
| 45 | ret = clk_get_set_enable("usb_iface_clk", 0, 1); |
| 46 | if(ret) |
| 47 | { |
| 48 | dprintf(CRITICAL, "failed to set usb_iface_clk ret = %d\n", ret); |
| 49 | ASSERT(0); |
| 50 | } |
| 51 | |
| 52 | ret = clk_get_set_enable("usb_core_clk", 75000000, 1); |
| 53 | if(ret) |
| 54 | { |
| 55 | dprintf(CRITICAL, "failed to set usb_core_clk ret = %d\n", ret); |
| 56 | ASSERT(0); |
| 57 | } |
| 58 | |
| 59 | mdelay(20); |
| 60 | |
| 61 | iclk = clk_get("usb_iface_clk"); |
| 62 | cclk = clk_get("usb_core_clk"); |
| 63 | |
| 64 | clk_disable(iclk); |
| 65 | clk_disable(cclk); |
| 66 | |
| 67 | mdelay(20); |
| 68 | |
| 69 | /* Start the block reset for usb */ |
| 70 | writel(1, USB_HS_BCR); |
| 71 | |
| 72 | mdelay(20); |
| 73 | |
| 74 | /* Take usb block out of reset */ |
| 75 | writel(0, USB_HS_BCR); |
| 76 | |
| 77 | mdelay(20); |
| 78 | |
| 79 | ret = clk_enable(iclk); |
| 80 | |
| 81 | if(ret) |
| 82 | { |
| 83 | dprintf(CRITICAL, "failed to set usb_iface_clk after async ret = %d\n", ret); |
| 84 | ASSERT(0); |
| 85 | } |
| 86 | |
| 87 | ret = clk_enable(cclk); |
| 88 | |
| 89 | if(ret) |
| 90 | { |
| 91 | dprintf(CRITICAL, "failed to set usb_iface_clk after async ret = %d\n", ret); |
| 92 | ASSERT(0); |
| 93 | } |
| 94 | |
| 95 | } |
| 96 | |
| 97 | void clock_init_mmc(uint32_t interface) |
| 98 | { |
| 99 | char clk_name[64]; |
| 100 | int ret; |
| 101 | |
| 102 | snprintf(clk_name, 64, "sdc%u_iface_clk", interface); |
| 103 | |
| 104 | /* enable interface clock */ |
| 105 | ret = clk_get_set_enable(clk_name, 0, 1); |
| 106 | if(ret) |
| 107 | { |
| 108 | dprintf(CRITICAL, "failed to set sdc1_iface_clk ret = %d\n", ret); |
| 109 | ASSERT(0); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | /* Configure MMC clock */ |
| 114 | void clock_config_mmc(uint32_t interface, uint32_t freq) |
| 115 | { |
| 116 | int ret; |
| 117 | uint32_t reg; |
| 118 | char clk_name[64]; |
| 119 | |
| 120 | snprintf(clk_name, 64, "sdc%u_core_clk", interface); |
| 121 | |
| 122 | /* Disalbe MCI_CLK before changing the sdcc clock */ |
| 123 | #ifndef MMC_SDHCI_SUPPORT |
| 124 | mmc_boot_mci_clk_disable(); |
| 125 | #endif |
| 126 | |
| 127 | if(freq == MMC_CLK_400KHZ) |
| 128 | { |
| 129 | ret = clk_get_set_enable(clk_name, 400000, 1); |
| 130 | } |
| 131 | else if(freq == MMC_CLK_50MHZ) |
| 132 | { |
| 133 | ret = clk_get_set_enable(clk_name, 50000000, 1); |
| 134 | } |
| 135 | else if(freq == MMC_CLK_96MHZ) |
| 136 | { |
| 137 | ret = clk_get_set_enable(clk_name, 100000000, 1); |
| 138 | } |
| 139 | else if(freq == MMC_CLK_200MHZ) |
| 140 | { |
| 141 | ret = clk_get_set_enable(clk_name, 200000000, 1); |
| 142 | } |
| 143 | else |
| 144 | { |
| 145 | dprintf(CRITICAL, "sdc frequency (%d) is not supported\n", freq); |
| 146 | ASSERT(0); |
| 147 | } |
| 148 | |
| 149 | |
| 150 | if(ret) |
| 151 | { |
| 152 | dprintf(CRITICAL, "failed to set sdc1_core_clk ret = %d\n", ret); |
| 153 | ASSERT(0); |
| 154 | } |
| 155 | |
| 156 | /* Enalbe MCI clock */ |
| 157 | #ifndef MMC_SDHCI_SUPPORT |
| 158 | mmc_boot_mci_clk_enable(); |
| 159 | #endif |
| 160 | } |
| 161 | |
| 162 | /* Configure UART clock based on the UART block id*/ |
| 163 | void clock_config_uart_dm(uint8_t id) |
| 164 | { |
| 165 | int ret; |
| 166 | char str[256]; |
| 167 | |
| 168 | sprintf(str, "uart%d_iface_clk", id); |
| 169 | ret = clk_get_set_enable(str, 0, 1); |
| 170 | if(ret) |
| 171 | { |
| 172 | dprintf(CRITICAL, "failed to set uart2_iface_clk ret = %d\n", ret); |
| 173 | ASSERT(0); |
| 174 | } |
| 175 | |
| 176 | sprintf(str, "uart%d_core_clk", id); |
| 177 | ret = clk_get_set_enable(str, 7372800, 1); |
| 178 | if(ret) |
| 179 | { |
| 180 | dprintf(CRITICAL, "failed to set uart1_core_clk ret = %d\n", ret); |
| 181 | ASSERT(0); |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | /* Function to asynchronously reset CE. |
| 186 | * Function assumes that all the CE clocks are off. |
| 187 | */ |
| 188 | static void ce_async_reset(uint8_t instance) |
| 189 | { |
| 190 | if (instance == 1) |
| 191 | { |
| 192 | /* TODO: Add support for instance 1. */ |
| 193 | dprintf(CRITICAL, "CE instance not supported instance = %d", instance); |
| 194 | ASSERT(0); |
| 195 | } |
| 196 | else if (instance == 2) |
| 197 | { |
| 198 | /* Start the block reset for CE */ |
| 199 | writel(1, GCC_CE2_BCR); |
| 200 | |
| 201 | udelay(2); |
| 202 | |
| 203 | /* Take CE block out of reset */ |
| 204 | writel(0, GCC_CE2_BCR); |
| 205 | |
| 206 | udelay(2); |
| 207 | } |
| 208 | else |
| 209 | { |
| 210 | dprintf(CRITICAL, "CE instance not supported instance = %d", instance); |
| 211 | ASSERT(0); |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | void clock_ce_enable(uint8_t instance) |
| 216 | { |
| 217 | int ret; |
| 218 | char clk_name[64]; |
| 219 | |
| 220 | snprintf(clk_name, 64, "ce%u_src_clk", instance); |
| 221 | ret = clk_get_set_enable(clk_name, 100000000, 1); |
| 222 | if(ret) |
| 223 | { |
| 224 | dprintf(CRITICAL, "failed to set ce_src_clk ret = %d\n", ret); |
| 225 | ASSERT(0); |
| 226 | } |
| 227 | |
| 228 | snprintf(clk_name, 64, "ce%u_core_clk", instance); |
| 229 | ret = clk_get_set_enable(clk_name, 0, 1); |
| 230 | if(ret) |
| 231 | { |
| 232 | dprintf(CRITICAL, "failed to set ce_core_clk ret = %d\n", ret); |
| 233 | ASSERT(0); |
| 234 | } |
| 235 | |
| 236 | snprintf(clk_name, 64, "ce%u_ahb_clk", instance); |
| 237 | ret = clk_get_set_enable(clk_name, 0, 1); |
| 238 | if(ret) |
| 239 | { |
| 240 | dprintf(CRITICAL, "failed to set ce_ahb_clk ret = %d\n", ret); |
| 241 | ASSERT(0); |
| 242 | } |
| 243 | |
| 244 | snprintf(clk_name, 64, "ce%u_axi_clk", instance); |
| 245 | ret = clk_get_set_enable(clk_name, 0, 1); |
| 246 | if(ret) |
| 247 | { |
| 248 | dprintf(CRITICAL, "failed to set ce_axi_clk ret = %d\n", ret); |
| 249 | ASSERT(0); |
| 250 | } |
| 251 | |
| 252 | /* Wait for 48 * #pipes cycles. |
| 253 | * This is necessary as immediately after an access control reset (boot up) |
| 254 | * or a debug re-enable, the Crypto core sequentially clears its internal |
| 255 | * pipe key storage memory. If pipe key initialization writes are attempted |
| 256 | * during this time, they may be overwritten by the internal clearing logic. |
| 257 | */ |
| 258 | udelay(1); |
| 259 | } |
| 260 | |
| 261 | void clock_ce_disable(uint8_t instance) |
| 262 | { |
| 263 | struct clk *ahb_clk; |
| 264 | struct clk *cclk; |
| 265 | struct clk *axi_clk; |
| 266 | struct clk *src_clk; |
| 267 | char clk_name[64]; |
| 268 | |
| 269 | snprintf(clk_name, 64, "ce%u_src_clk", instance); |
| 270 | src_clk = clk_get(clk_name); |
| 271 | |
| 272 | snprintf(clk_name, 64, "ce%u_ahb_clk", instance); |
| 273 | ahb_clk = clk_get(clk_name); |
| 274 | |
| 275 | snprintf(clk_name, 64, "ce%u_axi_clk", instance); |
| 276 | axi_clk = clk_get(clk_name); |
| 277 | |
| 278 | snprintf(clk_name, 64, "ce%u_core_clk", instance); |
| 279 | cclk = clk_get(clk_name); |
| 280 | |
| 281 | clk_disable(ahb_clk); |
| 282 | clk_disable(axi_clk); |
| 283 | clk_disable(cclk); |
| 284 | clk_disable(src_clk); |
| 285 | |
| 286 | /* Some delay for the clocks to stabalize. */ |
| 287 | udelay(1); |
| 288 | } |
| 289 | |
| 290 | void clock_config_ce(uint8_t instance) |
| 291 | { |
| 292 | /* Need to enable the clock before disabling since the clk_disable() |
| 293 | * has a check to default to nop when the clk_enable() is not called |
| 294 | * on that particular clock. |
| 295 | */ |
| 296 | clock_ce_enable(instance); |
| 297 | |
| 298 | clock_ce_disable(instance); |
| 299 | |
| 300 | ce_async_reset(instance); |
| 301 | |
| 302 | clock_ce_enable(instance); |
| 303 | |
| 304 | } |
| 305 | |
| 306 | void clock_config_blsp_i2c(uint8_t blsp_id, uint8_t qup_id) |
| 307 | { |
| 308 | uint8_t ret = 0; |
| 309 | char clk_name[64]; |
| 310 | |
| 311 | struct clk *qup_clk; |
| 312 | |
| 313 | snprintf(clk_name, 64, "blsp%u_ahb_clk", blsp_id); |
| 314 | |
| 315 | ret = clk_get_set_enable(clk_name, 0 , 1); |
| 316 | |
| 317 | if (ret) { |
| 318 | dprintf(CRITICAL, "Failed to enable %s clock\n", clk_name); |
| 319 | return; |
| 320 | } |
| 321 | |
| 322 | snprintf(clk_name, 64, "blsp%u_qup%u_i2c_apps_clk", blsp_id, |
| 323 | (qup_id + 1)); |
| 324 | |
| 325 | qup_clk = clk_get(clk_name); |
| 326 | |
| 327 | if (!qup_clk) { |
| 328 | dprintf(CRITICAL, "Failed to get %s\n", clk_name); |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | ret = clk_enable(qup_clk); |
| 333 | |
| 334 | if (ret) { |
| 335 | dprintf(CRITICAL, "Failed to enable %s\n", clk_name); |
| 336 | return; |
| 337 | } |
| 338 | } |