1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * pxa910 clock framework source file 4 * 5 * Copyright (C) 2012 Marvell 6 * Chao Xie <xiechao.mail@gmail.com> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/kernel.h> 11 #include <linux/spinlock.h> 12 #include <linux/io.h> 13 #include <linux/delay.h> 14 #include <linux/err.h> 15 #include <linux/of_address.h> 16 17 #include <dt-bindings/clock/marvell,pxa910.h> 18 19 #include "clk.h" 20 #include "reset.h" 21 22 #define APBC_RTC 0x28 23 #define APBC_TWSI0 0x2c 24 #define APBC_KPC 0x18 25 #define APBC_UART0 0x0 26 #define APBC_UART1 0x4 27 #define APBC_GPIO 0x8 28 #define APBC_PWM0 0xc 29 #define APBC_PWM1 0x10 30 #define APBC_PWM2 0x14 31 #define APBC_PWM3 0x18 32 #define APBC_SSP0 0x1c 33 #define APBC_SSP1 0x20 34 #define APBC_SSP2 0x4c 35 #define APBC_TIMER0 0x30 36 #define APBC_TIMER1 0x44 37 #define APBCP_TWSI1 0x28 38 #define APBCP_UART2 0x1c 39 #define APMU_SDH0 0x54 40 #define APMU_SDH1 0x58 41 #define APMU_USB 0x5c 42 #define APMU_DISP0 0x4c 43 #define APMU_CCIC0 0x50 44 #define APMU_DFC 0x60 45 #define MPMU_UART_PLL 0x14 46 47 #define NR_CLKS 200 48 49 struct pxa910_clk_unit { 50 struct mmp_clk_unit unit; 51 void __iomem *mpmu_base; 52 void __iomem *apmu_base; 53 void __iomem *apbc_base; 54 void __iomem *apbcp_base; 55 }; 56 57 static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = { 58 {PXA910_CLK_CLK32, "clk32", NULL, 0, 32768}, 59 {PXA910_CLK_VCTCXO, "vctcxo", NULL, 0, 26000000}, 60 {PXA910_CLK_PLL1, "pll1", NULL, 0, 624000000}, 61 {PXA910_CLK_USB_PLL, "usb_pll", NULL, 0, 480000000}, 62 }; 63 64 static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = { 65 {PXA910_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0}, 66 {PXA910_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0}, 67 {PXA910_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0}, 68 {PXA910_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0}, 69 {PXA910_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0}, 70 {PXA910_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0}, 71 {PXA910_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0}, 72 {PXA910_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0}, 73 {PXA910_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0}, 74 {PXA910_CLK_PLL1_192, "pll1_192", "pll1_96", 1, 2, 0}, 75 {PXA910_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0}, 76 {PXA910_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0}, 77 {PXA910_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0}, 78 {PXA910_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0}, 79 }; 80 81 static struct mmp_clk_factor_masks uart_factor_masks = { 82 .factor = 2, 83 .num_mask = 0x1fff, 84 .den_mask = 0x1fff, 85 .num_shift = 16, 86 .den_shift = 0, 87 }; 88 89 static struct u32_fract uart_factor_tbl[] = { 90 { .numerator = 8125, .denominator = 1536 }, /* 14.745MHZ */ 91 }; 92 93 static void pxa910_pll_init(struct pxa910_clk_unit *pxa_unit) 94 { 95 struct clk *clk; 96 struct mmp_clk_unit *unit = &pxa_unit->unit; 97 98 mmp_register_fixed_rate_clks(unit, fixed_rate_clks, 99 ARRAY_SIZE(fixed_rate_clks)); 100 101 mmp_register_fixed_factor_clks(unit, fixed_factor_clks, 102 ARRAY_SIZE(fixed_factor_clks)); 103 104 clk = mmp_clk_register_factor("uart_pll", "pll1_4", 105 CLK_SET_RATE_PARENT, 106 pxa_unit->mpmu_base + MPMU_UART_PLL, 107 &uart_factor_masks, uart_factor_tbl, 108 ARRAY_SIZE(uart_factor_tbl), NULL); 109 mmp_clk_add(unit, PXA910_CLK_UART_PLL, clk); 110 } 111 112 static DEFINE_SPINLOCK(uart0_lock); 113 static DEFINE_SPINLOCK(uart1_lock); 114 static DEFINE_SPINLOCK(uart2_lock); 115 static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"}; 116 117 static DEFINE_SPINLOCK(ssp0_lock); 118 static DEFINE_SPINLOCK(ssp1_lock); 119 static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"}; 120 121 static DEFINE_SPINLOCK(timer0_lock); 122 static DEFINE_SPINLOCK(timer1_lock); 123 static const char *timer_parent_names[] = {"pll1_48", "clk32", "pll1_96"}; 124 125 static DEFINE_SPINLOCK(reset_lock); 126 127 static struct mmp_param_mux_clk apbc_mux_clks[] = { 128 {0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock}, 129 {0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock}, 130 {0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock}, 131 {0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock}, 132 {0, "timer0_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER0, 4, 3, 0, &timer0_lock}, 133 {0, "timer1_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER1, 4, 3, 0, &timer1_lock}, 134 }; 135 136 static struct mmp_param_mux_clk apbcp_mux_clks[] = { 137 {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock}, 138 }; 139 140 static struct mmp_param_gate_clk apbc_gate_clks[] = { 141 {PXA910_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock}, 142 {PXA910_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock}, 143 {PXA910_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, 144 {PXA910_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, 145 {PXA910_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock}, 146 {PXA910_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock}, 147 {PXA910_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock}, 148 {PXA910_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock}, 149 /* The gate clocks has mux parent. */ 150 {PXA910_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock}, 151 {PXA910_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock}, 152 {PXA910_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock}, 153 {PXA910_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock}, 154 {PXA910_CLK_TIMER0, "timer0_clk", "timer0_mux", CLK_SET_RATE_PARENT, APBC_TIMER0, 0x3, 0x3, 0x0, 0, &timer0_lock}, 155 {PXA910_CLK_TIMER1, "timer1_clk", "timer1_mux", CLK_SET_RATE_PARENT, APBC_TIMER1, 0x3, 0x3, 0x0, 0, &timer1_lock}, 156 }; 157 158 static struct mmp_param_gate_clk apbcp_gate_clks[] = { 159 {PXA910_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBCP_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock}, 160 /* The gate clocks has mux parent. */ 161 {PXA910_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock}, 162 }; 163 164 static void pxa910_apb_periph_clk_init(struct pxa910_clk_unit *pxa_unit) 165 { 166 struct mmp_clk_unit *unit = &pxa_unit->unit; 167 168 mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base, 169 ARRAY_SIZE(apbc_mux_clks)); 170 171 mmp_register_mux_clks(unit, apbcp_mux_clks, pxa_unit->apbcp_base, 172 ARRAY_SIZE(apbcp_mux_clks)); 173 174 mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base, 175 ARRAY_SIZE(apbc_gate_clks)); 176 177 mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->apbcp_base, 178 ARRAY_SIZE(apbcp_gate_clks)); 179 } 180 181 static DEFINE_SPINLOCK(sdh0_lock); 182 static DEFINE_SPINLOCK(sdh1_lock); 183 static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"}; 184 185 static DEFINE_SPINLOCK(usb_lock); 186 187 static DEFINE_SPINLOCK(disp0_lock); 188 static const char *disp_parent_names[] = {"pll1_2", "pll1_12"}; 189 190 static DEFINE_SPINLOCK(ccic0_lock); 191 static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"}; 192 static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"}; 193 194 static struct mmp_param_mux_clk apmu_mux_clks[] = { 195 {0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock}, 196 {0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock}, 197 {0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock}, 198 {0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock}, 199 {0, "ccic0_phy_mux", ccic_phy_parent_names, ARRAY_SIZE(ccic_phy_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 7, 1, 0, &ccic0_lock}, 200 }; 201 202 static struct mmp_param_div_clk apmu_div_clks[] = { 203 {0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock}, 204 }; 205 206 static struct mmp_param_gate_clk apmu_gate_clks[] = { 207 {PXA910_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL}, 208 {PXA910_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock}, 209 {PXA910_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock}, 210 /* The gate clocks has mux parent. */ 211 {PXA910_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock}, 212 {PXA910_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock}, 213 {PXA910_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock}, 214 {PXA910_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock}, 215 {PXA910_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock}, 216 {PXA910_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock}, 217 }; 218 219 static void pxa910_axi_periph_clk_init(struct pxa910_clk_unit *pxa_unit) 220 { 221 struct mmp_clk_unit *unit = &pxa_unit->unit; 222 223 mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base, 224 ARRAY_SIZE(apmu_mux_clks)); 225 226 mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base, 227 ARRAY_SIZE(apmu_div_clks)); 228 229 mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base, 230 ARRAY_SIZE(apmu_gate_clks)); 231 } 232 233 static void pxa910_clk_reset_init(struct device_node *np, 234 struct pxa910_clk_unit *pxa_unit) 235 { 236 struct mmp_clk_reset_cell *cells; 237 int i, base, nr_resets_apbc, nr_resets_apbcp, nr_resets; 238 239 nr_resets_apbc = ARRAY_SIZE(apbc_gate_clks); 240 nr_resets_apbcp = ARRAY_SIZE(apbcp_gate_clks); 241 nr_resets = nr_resets_apbc + nr_resets_apbcp; 242 cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL); 243 if (!cells) 244 return; 245 246 base = 0; 247 for (i = 0; i < nr_resets_apbc; i++) { 248 cells[base + i].clk_id = apbc_gate_clks[i].id; 249 cells[base + i].reg = 250 pxa_unit->apbc_base + apbc_gate_clks[i].offset; 251 cells[base + i].flags = 0; 252 cells[base + i].lock = apbc_gate_clks[i].lock; 253 cells[base + i].bits = 0x4; 254 } 255 256 base = nr_resets_apbc; 257 for (i = 0; i < nr_resets_apbcp; i++) { 258 cells[base + i].clk_id = apbcp_gate_clks[i].id; 259 cells[base + i].reg = 260 pxa_unit->apbc_base + apbc_gate_clks[i].offset; 261 cells[base + i].flags = 0; 262 cells[base + i].lock = apbc_gate_clks[i].lock; 263 cells[base + i].bits = 0x4; 264 } 265 266 mmp_clk_reset_register(np, cells, nr_resets); 267 } 268 269 static void __init pxa910_clk_init(struct device_node *np) 270 { 271 struct pxa910_clk_unit *pxa_unit; 272 273 pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL); 274 if (!pxa_unit) 275 return; 276 277 pxa_unit->mpmu_base = of_iomap(np, 0); 278 if (!pxa_unit->mpmu_base) { 279 pr_err("failed to map mpmu registers\n"); 280 goto free_memory; 281 } 282 283 pxa_unit->apmu_base = of_iomap(np, 1); 284 if (!pxa_unit->apmu_base) { 285 pr_err("failed to map apmu registers\n"); 286 goto unmap_mpmu_region; 287 } 288 289 pxa_unit->apbc_base = of_iomap(np, 2); 290 if (!pxa_unit->apbc_base) { 291 pr_err("failed to map apbc registers\n"); 292 goto unmap_apmu_region; 293 } 294 295 pxa_unit->apbcp_base = of_iomap(np, 3); 296 if (!pxa_unit->apbcp_base) { 297 pr_err("failed to map apbcp registers\n"); 298 goto unmap_apbc_region; 299 } 300 301 mmp_clk_init(np, &pxa_unit->unit, NR_CLKS); 302 303 pxa910_pll_init(pxa_unit); 304 305 pxa910_apb_periph_clk_init(pxa_unit); 306 307 pxa910_axi_periph_clk_init(pxa_unit); 308 309 pxa910_clk_reset_init(np, pxa_unit); 310 311 return; 312 313 unmap_apbc_region: 314 iounmap(pxa_unit->apbc_base); 315 unmap_apmu_region: 316 iounmap(pxa_unit->apmu_base); 317 unmap_mpmu_region: 318 iounmap(pxa_unit->mpmu_base); 319 free_memory: 320 kfree(pxa_unit); 321 } 322 323 CLK_OF_DECLARE(pxa910_clk, "marvell,pxa910-clock", pxa910_clk_init); 324