Patrick Georgi | ac95903 | 2020-05-05 22:49:26 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 2 | |
Patrick Georgi | c323963 | 2019-04-23 21:31:24 +0200 | [diff] [blame] | 3 | #include <console/console.h> |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 4 | #include <device/mmio.h> |
| 5 | #include <types.h> |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 6 | #include <commonlib/helpers.h> |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 7 | #include <soc/clock.h> |
| 8 | |
| 9 | #define DIV(div) (div ? (2*div - 1) : 0) |
| 10 | #define HALF_DIVIDER(div2x) (div2x ? (div2x - 1) : 0) |
| 11 | |
| 12 | struct clock_config uart_cfg[] = { |
| 13 | { |
| 14 | .hz = 1843200, |
| 15 | .hw_ctl = 0x0, |
| 16 | .src = SRC_GPLL0_MAIN_800MHZ, |
| 17 | .div = DIV(0), |
| 18 | .m = 36, |
| 19 | .n = 15625, |
| 20 | .d_2 = 15625, |
| 21 | }, |
| 22 | { |
| 23 | .hz = 3686400, |
| 24 | .hw_ctl = 0x0, |
| 25 | .src = SRC_GPLL0_MAIN_800MHZ, |
| 26 | .div = DIV(0), |
| 27 | .m = 72, |
| 28 | .n = 15625, |
| 29 | .d_2 = 15625, |
| 30 | } |
| 31 | }; |
| 32 | |
| 33 | struct clock_config i2c_cfg[] = { |
| 34 | { |
| 35 | .hz = 19200000, |
| 36 | .hw_ctl = 0x0, |
| 37 | .src = SRC_XO_19_2MHZ, |
| 38 | .div = DIV(0), |
| 39 | }, |
| 40 | { |
| 41 | .hz = 50000000, |
| 42 | .hw_ctl = 0x0, |
| 43 | .src = SRC_GPLL0_MAIN_800MHZ, |
| 44 | .div = DIV(32), |
| 45 | } |
| 46 | }; |
| 47 | |
| 48 | struct clock_config spi_cfg[] = { |
| 49 | { |
| 50 | .hz = 1000000, |
| 51 | .hw_ctl = 0x0, |
| 52 | .src = SRC_XO_19_2MHZ, |
| 53 | .div = DIV(48), |
| 54 | }, |
| 55 | { |
| 56 | .hz = 7372800, |
| 57 | .src = SRC_GPLL0_MAIN_800MHZ, |
| 58 | .div = DIV(1), |
| 59 | .m = 144, |
| 60 | .n = 15625, |
| 61 | .d_2 = 15625, |
| 62 | }, |
| 63 | { |
| 64 | .hz = 19200000, |
| 65 | .hw_ctl = 0x0, |
| 66 | .src = SRC_XO_19_2MHZ, |
| 67 | .div = DIV(0), |
| 68 | }, |
| 69 | { |
| 70 | .hz = 30000000, |
| 71 | .hw_ctl = 0x0, |
| 72 | .src = SRC_XO_19_2MHZ, |
| 73 | .div = DIV(0), |
| 74 | }, |
| 75 | { |
| 76 | .hz = 50000000, |
| 77 | .hw_ctl = 0x0, |
| 78 | .src = SRC_GPLL0_MAIN_800MHZ, |
| 79 | .div = DIV(32), |
| 80 | } |
| 81 | }; |
| 82 | |
| 83 | static int clock_configure_gpll0(void) |
| 84 | { |
| 85 | /* Keep existing GPLL0 configuration, in RUN mode @800Mhz. */ |
Julius Werner | 55009af | 2019-12-02 22:03:27 -0800 | [diff] [blame] | 86 | setbits32(&gcc->gpll0.user_ctl, |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 87 | 1 << CLK_CTL_GPLL_PLLOUT_LV_EARLY_SHFT | |
| 88 | 1 << CLK_CTL_GPLL_PLLOUT_AUX2_SHFT | |
| 89 | 1 << CLK_CTL_GPLL_PLLOUT_AUX_SHFT | |
| 90 | 1 << CLK_CTL_GPLL_PLLOUT_MAIN_SHFT); |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | static int clock_configure_mnd(struct qcs405_clock *clk, uint32_t m, uint32_t n, |
| 95 | uint32_t d_2) |
| 96 | { |
| 97 | uint32_t reg_val; |
| 98 | |
| 99 | /* Configure Root Clock Generator(RCG) for Dual Edge Mode */ |
| 100 | reg_val = read32(&clk->rcg.cfg); |
| 101 | reg_val |= (2 << CLK_CTL_CFG_MODE_SHFT); |
| 102 | write32(&clk->rcg.cfg, reg_val); |
| 103 | |
| 104 | /* Set M/N/D config */ |
| 105 | write32(&clk->m, m & CLK_CTL_RCG_MND_BMSK); |
| 106 | write32(&clk->n, ~(n-m) & CLK_CTL_RCG_MND_BMSK); |
| 107 | write32(&clk->d_2, ~(d_2) & CLK_CTL_RCG_MND_BMSK); |
| 108 | |
| 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static int clock_configure(struct qcs405_clock *clk, |
| 113 | struct clock_config *clk_cfg, |
| 114 | uint32_t hz, uint32_t num_perfs) |
| 115 | { |
| 116 | uint32_t reg_val; |
| 117 | uint32_t idx; |
| 118 | |
| 119 | for (idx = 0; idx < num_perfs; idx++) |
| 120 | if (hz <= clk_cfg[idx].hz) |
| 121 | break; |
| 122 | |
| 123 | reg_val = (clk_cfg[idx].src << CLK_CTL_CFG_SRC_SEL_SHFT) | |
| 124 | (clk_cfg[idx].div << CLK_CTL_CFG_SRC_DIV_SHFT); |
| 125 | |
| 126 | /* Set clock config */ |
| 127 | write32(&clk->rcg.cfg, reg_val); |
| 128 | |
| 129 | if (clk_cfg[idx].m != 0) |
| 130 | clock_configure_mnd(clk, clk_cfg[idx].m, clk_cfg[idx].n, |
| 131 | clk_cfg[idx].d_2); |
| 132 | |
| 133 | /* Commit config to RCG*/ |
Julius Werner | 55009af | 2019-12-02 22:03:27 -0800 | [diff] [blame] | 134 | setbits32(&clk->rcg.cmd, BIT(CLK_CTL_CMD_UPDATE_SHFT)); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |
| 139 | static bool clock_is_off(void *cbcr_addr) |
| 140 | { |
| 141 | return (read32(cbcr_addr) & CLK_CTL_CBC_CLK_OFF_BMSK); |
| 142 | } |
| 143 | |
| 144 | static int clock_enable_vote(void *cbcr_addr, void *vote_addr, |
| 145 | uint32_t vote_bit) |
| 146 | { |
| 147 | |
| 148 | /* Set clock vote bit */ |
Julius Werner | 55009af | 2019-12-02 22:03:27 -0800 | [diff] [blame] | 149 | setbits32(vote_addr, BIT(vote_bit)); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 150 | |
| 151 | /* Ensure clock is enabled */ |
| 152 | while (clock_is_off(cbcr_addr)); |
| 153 | |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | static int clock_enable(void *cbcr_addr) |
| 158 | { |
| 159 | |
| 160 | /* Set clock enable bit */ |
Julius Werner | 55009af | 2019-12-02 22:03:27 -0800 | [diff] [blame] | 161 | setbits32(cbcr_addr, BIT(CLK_CTL_CBC_CLK_EN_SHFT)); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 162 | |
| 163 | /* Ensure clock is enabled */ |
| 164 | while (clock_is_off(cbcr_addr)) |
| 165 | ; |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | static int clock_disable(void *cbcr_addr) |
| 171 | { |
| 172 | |
| 173 | /* Set clock enable bit */ |
Julius Werner | 55009af | 2019-12-02 22:03:27 -0800 | [diff] [blame] | 174 | clrbits32(cbcr_addr, BIT(CLK_CTL_CBC_CLK_EN_SHFT)); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | int clock_reset_bcr(void *bcr_addr, bool reset) |
| 179 | { |
| 180 | struct qcs405_bcr *bcr = bcr_addr; |
| 181 | |
| 182 | if (reset) |
Julius Werner | 55009af | 2019-12-02 22:03:27 -0800 | [diff] [blame] | 183 | setbits32(&bcr->bcr, BIT(CLK_CTL_BCR_BLK_ARES_SHFT)); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 184 | else |
Julius Werner | 55009af | 2019-12-02 22:03:27 -0800 | [diff] [blame] | 185 | clrbits32(&bcr->bcr, BIT(CLK_CTL_BCR_BLK_ARES_SHFT)); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 186 | |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | void clock_configure_uart(uint32_t hz) |
| 191 | { |
| 192 | struct qcs405_clock *uart_clk = (struct qcs405_clock *) |
| 193 | &gcc->blsp1_uart2_apps_clk; |
| 194 | |
| 195 | clock_configure(uart_clk, uart_cfg, hz, ARRAY_SIZE(uart_cfg)); |
| 196 | } |
| 197 | |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 198 | void clock_configure_spi(int blsp, int qup, uint32_t hz) |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 199 | { |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 200 | struct qcs405_clock *spi_clk = 0; |
| 201 | |
| 202 | if (blsp == 1) { |
| 203 | switch (qup) { |
| 204 | case 0: |
| 205 | spi_clk = (struct qcs405_clock *) |
| 206 | &gcc->blsp1_qup0_spi_clk; |
| 207 | break; |
| 208 | case 1: |
| 209 | spi_clk = (struct qcs405_clock *) |
| 210 | &gcc->blsp1_qup1_spi_clk; |
| 211 | break; |
| 212 | case 2: |
| 213 | spi_clk = (struct qcs405_clock *) |
| 214 | &gcc->blsp1_qup2_spi_clk; |
| 215 | break; |
| 216 | case 3: |
| 217 | spi_clk = (struct qcs405_clock *) |
| 218 | &gcc->blsp1_qup3_spi_clk; |
| 219 | break; |
| 220 | case 4: |
| 221 | spi_clk = (struct qcs405_clock *) |
| 222 | &gcc->blsp1_qup4_spi_clk; |
| 223 | break; |
Jacob Garber | 53b4b28 | 2019-07-23 11:46:24 -0600 | [diff] [blame] | 224 | default: |
| 225 | printk(BIOS_ERR, "Invalid QUP %d\n", qup); |
| 226 | return; |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 227 | } |
Jacob Garber | 53b4b28 | 2019-07-23 11:46:24 -0600 | [diff] [blame] | 228 | } else if (blsp == 2) { |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 229 | spi_clk = (struct qcs405_clock *)&gcc->blsp2_qup0_spi_clk; |
Jacob Garber | 53b4b28 | 2019-07-23 11:46:24 -0600 | [diff] [blame] | 230 | } else { |
| 231 | printk(BIOS_ERR, "BLSP %d not supported\n", blsp); |
| 232 | return; |
| 233 | } |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 234 | |
| 235 | clock_configure(spi_clk, spi_cfg, hz, ARRAY_SIZE(spi_cfg)); |
| 236 | } |
| 237 | |
Taniya Das | 846f8c0 | 2019-04-17 15:58:15 +0530 | [diff] [blame] | 238 | void clock_configure_i2c(uint32_t hz) |
| 239 | { |
| 240 | struct qcs405_clock *i2c_clk = |
| 241 | (struct qcs405_clock *)&gcc->blsp1_qup1_i2c_clk; |
| 242 | |
| 243 | clock_configure(i2c_clk, i2c_cfg, hz, ARRAY_SIZE(i2c_cfg)); |
| 244 | } |
| 245 | |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 246 | void clock_enable_uart(void) |
| 247 | { |
| 248 | clock_enable(&gcc->blsp1_uart2_apps_cbcr); |
| 249 | } |
| 250 | |
| 251 | void clock_disable_uart(void) |
| 252 | { |
| 253 | clock_disable(&gcc->blsp1_uart2_apps_cbcr); |
| 254 | } |
| 255 | |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 256 | void clock_enable_spi(int blsp, int qup) |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 257 | { |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 258 | if (blsp == 1) { |
| 259 | switch (qup) { |
| 260 | case 0: |
| 261 | clock_enable(&gcc->blsp1_qup0_spi_apps_cbcr); |
| 262 | break; |
| 263 | case 1: |
| 264 | clock_enable(&gcc->blsp1_qup1_spi_apps_cbcr); |
| 265 | break; |
| 266 | case 2: |
| 267 | clock_enable(&gcc->blsp1_qup2_spi_apps_cbcr); |
| 268 | break; |
| 269 | case 3: |
| 270 | clock_enable(&gcc->blsp1_qup3_spi_apps_cbcr); |
| 271 | break; |
| 272 | case 4: |
| 273 | clock_enable(&gcc->blsp1_qup4_spi_apps_cbcr); |
| 274 | break; |
| 275 | } |
| 276 | } else if (blsp == 2) |
| 277 | clock_enable(&gcc->blsp2_qup0_spi_apps_cbcr); |
| 278 | else |
| 279 | printk(BIOS_ERR, "BLSP%d not supported\n", blsp); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 280 | } |
| 281 | |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 282 | void clock_disable_spi(int blsp, int qup) |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 283 | { |
Taniya Das | 3ee4857 | 2019-03-28 16:54:15 +0530 | [diff] [blame] | 284 | if (blsp == 1) { |
| 285 | switch (qup) { |
| 286 | case 0: |
| 287 | clock_enable(&gcc->blsp1_qup0_spi_apps_cbcr); |
| 288 | break; |
| 289 | case 1: |
| 290 | clock_enable(&gcc->blsp1_qup1_spi_apps_cbcr); |
| 291 | break; |
| 292 | case 2: |
| 293 | clock_enable(&gcc->blsp1_qup2_spi_apps_cbcr); |
| 294 | break; |
| 295 | case 3: |
| 296 | clock_enable(&gcc->blsp1_qup3_spi_apps_cbcr); |
| 297 | break; |
| 298 | case 4: |
| 299 | clock_enable(&gcc->blsp1_qup4_spi_apps_cbcr); |
| 300 | break; |
| 301 | } |
| 302 | } else if (blsp == 2) |
| 303 | clock_enable(&gcc->blsp2_qup0_spi_apps_cbcr); |
| 304 | else |
| 305 | printk(BIOS_ERR, "BLSP%d not supported\n", blsp); |
| 306 | |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 307 | } |
| 308 | |
Taniya Das | 846f8c0 | 2019-04-17 15:58:15 +0530 | [diff] [blame] | 309 | void clock_enable_i2c(void) |
| 310 | { |
| 311 | clock_enable(&gcc->blsp1_qup1_i2c_apps_cbcr); |
| 312 | } |
| 313 | |
| 314 | void clock_disable_i2c(void) |
| 315 | { |
| 316 | clock_disable(&gcc->blsp1_qup1_i2c_apps_cbcr); |
| 317 | } |
| 318 | |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 319 | void clock_init(void) |
| 320 | { |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 321 | clock_configure_gpll0(); |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 322 | clock_enable_vote(&gcc->blsp1_ahb_cbcr, |
| 323 | &gcc->gcc_apcs_clock_branch_en_vote, |
| 324 | BLSP1_AHB_CLK_ENA); |
| 325 | |
Pranav Agrawal | e651e01 | 2018-11-20 18:16:26 +0530 | [diff] [blame] | 326 | clock_enable_vote(&gcc->blsp2_ahb_cbcr, |
| 327 | &gcc->gcc_apcs_clock_branch_en_vote, |
| 328 | BLSP2_AHB_CLK_ENA); |
| 329 | } |