1 /* 2 * pxa910 clock framework source file 3 * 4 * Copyright (C) 2012 Marvell 5 * Chao Xie <xiechao.mail@gmail.com> 6 * 7 * This file is licensed under the terms of the GNU General Public 8 * License version 2. This program is licensed "as is" without any 9 * warranty of any kind, whether express or implied. 10 */ 11 12 #include <linux/module.h> 13 #include <linux/kernel.h> 14 #include <linux/spinlock.h> 15 #include <linux/io.h> 16 #include <linux/delay.h> 17 #include <linux/err.h> 18 #include <linux/of_address.h> 19 20 #include <dt-bindings/clock/marvell,pxa910.h> 21 22 #include "clk.h" 23 #include "reset.h" 24 25 #define APBC_RTC 0x28 26 #define APBC_TWSI0 0x2c 27 #define APBC_KPC 0x18 28 #define APBC_UART0 0x0 29 #define APBC_UART1 0x4 30 #define APBC_GPIO 0x8 31 #define APBC_PWM0 0xc 32 #define APBC_PWM1 0x10 33 #define APBC_PWM2 0x14 34 #define APBC_PWM3 0x18 35 #define APBC_SSP0 0x1c 36 #define APBC_SSP1 0x20 37 #define APBC_SSP2 0x4c 38 #define APBC_TIMER0 0x30 39 #define APBC_TIMER1 0x44 40 #define APBCP_TWSI1 0x28 41 #define APBCP_UART2 0x1c 42 #define APMU_SDH0 0x54 43 #define APMU_SDH1 0x58 44 #define APMU_USB 0x5c 45 #define APMU_DISP0 0x4c 46 #define APMU_CCIC0 0x50 47 #define APMU_DFC 0x60 48 #define MPMU_UART_PLL 0x14 49 50 struct pxa910_clk_unit { 51 struct mmp_clk_unit unit; 52 void __iomem *mpmu_base; 53 void __iomem *apmu_base; 54 void __iomem *apbc_base; 55 void __iomem *apbcp_base; 56 }; 57 58 static struct mmp_param_fixed_rate_clk fixed_rate_clks[] = { 59 {PXA910_CLK_CLK32, "clk32", NULL, 0, 32768}, 60 {PXA910_CLK_VCTCXO, "vctcxo", NULL, 0, 26000000}, 61 {PXA910_CLK_PLL1, "pll1", NULL, 0, 624000000}, 62 {PXA910_CLK_USB_PLL, "usb_pll", NULL, 0, 480000000}, 63 }; 64 65 static struct mmp_param_fixed_factor_clk fixed_factor_clks[] = { 66 {PXA910_CLK_PLL1_2, "pll1_2", "pll1", 1, 2, 0}, 67 {PXA910_CLK_PLL1_4, "pll1_4", "pll1_2", 1, 2, 0}, 68 {PXA910_CLK_PLL1_8, "pll1_8", "pll1_4", 1, 2, 0}, 69 {PXA910_CLK_PLL1_16, "pll1_16", "pll1_8", 1, 2, 0}, 70 {PXA910_CLK_PLL1_6, "pll1_6", "pll1_2", 1, 3, 0}, 71 {PXA910_CLK_PLL1_12, "pll1_12", "pll1_6", 1, 2, 0}, 72 {PXA910_CLK_PLL1_24, "pll1_24", "pll1_12", 1, 2, 0}, 73 {PXA910_CLK_PLL1_48, "pll1_48", "pll1_24", 1, 2, 0}, 74 {PXA910_CLK_PLL1_96, "pll1_96", "pll1_48", 1, 2, 0}, 75 {PXA910_CLK_PLL1_192, "pll1_192", "pll1_96", 1, 2, 0}, 76 {PXA910_CLK_PLL1_13, "pll1_13", "pll1", 1, 13, 0}, 77 {PXA910_CLK_PLL1_13_1_5, "pll1_13_1_5", "pll1_13", 2, 3, 0}, 78 {PXA910_CLK_PLL1_2_1_5, "pll1_2_1_5", "pll1_2", 2, 3, 0}, 79 {PXA910_CLK_PLL1_3_16, "pll1_3_16", "pll1", 3, 16, 0}, 80 }; 81 82 static struct mmp_clk_factor_masks uart_factor_masks = { 83 .factor = 2, 84 .num_mask = 0x1fff, 85 .den_mask = 0x1fff, 86 .num_shift = 16, 87 .den_shift = 0, 88 }; 89 90 static struct mmp_clk_factor_tbl uart_factor_tbl[] = { 91 {.num = 8125, .den = 1536}, /*14.745MHZ */ 92 }; 93 94 static void pxa910_pll_init(struct pxa910_clk_unit *pxa_unit) 95 { 96 struct clk *clk; 97 struct mmp_clk_unit *unit = &pxa_unit->unit; 98 99 mmp_register_fixed_rate_clks(unit, fixed_rate_clks, 100 ARRAY_SIZE(fixed_rate_clks)); 101 102 mmp_register_fixed_factor_clks(unit, fixed_factor_clks, 103 ARRAY_SIZE(fixed_factor_clks)); 104 105 clk = mmp_clk_register_factor("uart_pll", "pll1_4", 106 CLK_SET_RATE_PARENT, 107 pxa_unit->mpmu_base + MPMU_UART_PLL, 108 &uart_factor_masks, uart_factor_tbl, 109 ARRAY_SIZE(uart_factor_tbl), NULL); 110 mmp_clk_add(unit, PXA910_CLK_UART_PLL, clk); 111 } 112 113 static DEFINE_SPINLOCK(uart0_lock); 114 static DEFINE_SPINLOCK(uart1_lock); 115 static DEFINE_SPINLOCK(uart2_lock); 116 static const char *uart_parent_names[] = {"pll1_3_16", "uart_pll"}; 117 118 static DEFINE_SPINLOCK(ssp0_lock); 119 static DEFINE_SPINLOCK(ssp1_lock); 120 static const char *ssp_parent_names[] = {"pll1_96", "pll1_48", "pll1_24", "pll1_12"}; 121 122 static DEFINE_SPINLOCK(timer0_lock); 123 static DEFINE_SPINLOCK(timer1_lock); 124 static const char *timer_parent_names[] = {"pll1_48", "clk32", "pll1_96"}; 125 126 static DEFINE_SPINLOCK(reset_lock); 127 128 static struct mmp_param_mux_clk apbc_mux_clks[] = { 129 {0, "uart0_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART0, 4, 3, 0, &uart0_lock}, 130 {0, "uart1_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBC_UART1, 4, 3, 0, &uart1_lock}, 131 {0, "ssp0_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP0, 4, 3, 0, &ssp0_lock}, 132 {0, "ssp1_mux", ssp_parent_names, ARRAY_SIZE(ssp_parent_names), CLK_SET_RATE_PARENT, APBC_SSP1, 4, 3, 0, &ssp1_lock}, 133 {0, "timer0_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER0, 4, 3, 0, &timer0_lock}, 134 {0, "timer1_mux", timer_parent_names, ARRAY_SIZE(timer_parent_names), CLK_SET_RATE_PARENT, APBC_TIMER1, 4, 3, 0, &timer1_lock}, 135 }; 136 137 static struct mmp_param_mux_clk apbcp_mux_clks[] = { 138 {0, "uart2_mux", uart_parent_names, ARRAY_SIZE(uart_parent_names), CLK_SET_RATE_PARENT, APBCP_UART2, 4, 3, 0, &uart2_lock}, 139 }; 140 141 static struct mmp_param_gate_clk apbc_gate_clks[] = { 142 {PXA910_CLK_TWSI0, "twsi0_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBC_TWSI0, 0x3, 0x3, 0x0, 0, &reset_lock}, 143 {PXA910_CLK_GPIO, "gpio_clk", "vctcxo", CLK_SET_RATE_PARENT, APBC_GPIO, 0x3, 0x3, 0x0, 0, &reset_lock}, 144 {PXA910_CLK_KPC, "kpc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_KPC, 0x3, 0x3, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, 145 {PXA910_CLK_RTC, "rtc_clk", "clk32", CLK_SET_RATE_PARENT, APBC_RTC, 0x83, 0x83, 0x0, MMP_CLK_GATE_NEED_DELAY, NULL}, 146 {PXA910_CLK_PWM0, "pwm0_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM0, 0x3, 0x3, 0x0, 0, &reset_lock}, 147 {PXA910_CLK_PWM1, "pwm1_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM1, 0x3, 0x3, 0x0, 0, &reset_lock}, 148 {PXA910_CLK_PWM2, "pwm2_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM2, 0x3, 0x3, 0x0, 0, &reset_lock}, 149 {PXA910_CLK_PWM3, "pwm3_clk", "pll1_48", CLK_SET_RATE_PARENT, APBC_PWM3, 0x3, 0x3, 0x0, 0, &reset_lock}, 150 /* The gate clocks has mux parent. */ 151 {PXA910_CLK_UART0, "uart0_clk", "uart0_mux", CLK_SET_RATE_PARENT, APBC_UART0, 0x3, 0x3, 0x0, 0, &uart0_lock}, 152 {PXA910_CLK_UART1, "uart1_clk", "uart1_mux", CLK_SET_RATE_PARENT, APBC_UART1, 0x3, 0x3, 0x0, 0, &uart1_lock}, 153 {PXA910_CLK_SSP0, "ssp0_clk", "ssp0_mux", CLK_SET_RATE_PARENT, APBC_SSP0, 0x3, 0x3, 0x0, 0, &ssp0_lock}, 154 {PXA910_CLK_SSP1, "ssp1_clk", "ssp1_mux", CLK_SET_RATE_PARENT, APBC_SSP1, 0x3, 0x3, 0x0, 0, &ssp1_lock}, 155 {PXA910_CLK_TIMER0, "timer0_clk", "timer0_mux", CLK_SET_RATE_PARENT, APBC_TIMER0, 0x3, 0x3, 0x0, 0, &timer0_lock}, 156 {PXA910_CLK_TIMER1, "timer1_clk", "timer1_mux", CLK_SET_RATE_PARENT, APBC_TIMER1, 0x3, 0x3, 0x0, 0, &timer1_lock}, 157 }; 158 159 static struct mmp_param_gate_clk apbcp_gate_clks[] = { 160 {PXA910_CLK_TWSI1, "twsi1_clk", "pll1_13_1_5", CLK_SET_RATE_PARENT, APBCP_TWSI1, 0x3, 0x3, 0x0, 0, &reset_lock}, 161 /* The gate clocks has mux parent. */ 162 {PXA910_CLK_UART2, "uart2_clk", "uart2_mux", CLK_SET_RATE_PARENT, APBCP_UART2, 0x3, 0x3, 0x0, 0, &uart2_lock}, 163 }; 164 165 static void pxa910_apb_periph_clk_init(struct pxa910_clk_unit *pxa_unit) 166 { 167 struct mmp_clk_unit *unit = &pxa_unit->unit; 168 169 mmp_register_mux_clks(unit, apbc_mux_clks, pxa_unit->apbc_base, 170 ARRAY_SIZE(apbc_mux_clks)); 171 172 mmp_register_mux_clks(unit, apbcp_mux_clks, pxa_unit->apbcp_base, 173 ARRAY_SIZE(apbcp_mux_clks)); 174 175 mmp_register_gate_clks(unit, apbc_gate_clks, pxa_unit->apbc_base, 176 ARRAY_SIZE(apbc_gate_clks)); 177 178 mmp_register_gate_clks(unit, apbcp_gate_clks, pxa_unit->apbcp_base, 179 ARRAY_SIZE(apbcp_gate_clks)); 180 } 181 182 static DEFINE_SPINLOCK(sdh0_lock); 183 static DEFINE_SPINLOCK(sdh1_lock); 184 static const char *sdh_parent_names[] = {"pll1_12", "pll1_13"}; 185 186 static DEFINE_SPINLOCK(usb_lock); 187 188 static DEFINE_SPINLOCK(disp0_lock); 189 static const char *disp_parent_names[] = {"pll1_2", "pll1_12"}; 190 191 static DEFINE_SPINLOCK(ccic0_lock); 192 static const char *ccic_parent_names[] = {"pll1_2", "pll1_12"}; 193 static const char *ccic_phy_parent_names[] = {"pll1_6", "pll1_12"}; 194 195 static struct mmp_param_mux_clk apmu_mux_clks[] = { 196 {0, "sdh0_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH0, 6, 1, 0, &sdh0_lock}, 197 {0, "sdh1_mux", sdh_parent_names, ARRAY_SIZE(sdh_parent_names), CLK_SET_RATE_PARENT, APMU_SDH1, 6, 1, 0, &sdh1_lock}, 198 {0, "disp0_mux", disp_parent_names, ARRAY_SIZE(disp_parent_names), CLK_SET_RATE_PARENT, APMU_DISP0, 6, 1, 0, &disp0_lock}, 199 {0, "ccic0_mux", ccic_parent_names, ARRAY_SIZE(ccic_parent_names), CLK_SET_RATE_PARENT, APMU_CCIC0, 6, 1, 0, &ccic0_lock}, 200 {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}, 201 }; 202 203 static struct mmp_param_div_clk apmu_div_clks[] = { 204 {0, "ccic0_sphy_div", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 10, 5, 0, &ccic0_lock}, 205 }; 206 207 static struct mmp_param_gate_clk apmu_gate_clks[] = { 208 {PXA910_CLK_DFC, "dfc_clk", "pll1_4", CLK_SET_RATE_PARENT, APMU_DFC, 0x19b, 0x19b, 0x0, 0, NULL}, 209 {PXA910_CLK_USB, "usb_clk", "usb_pll", 0, APMU_USB, 0x9, 0x9, 0x0, 0, &usb_lock}, 210 {PXA910_CLK_SPH, "sph_clk", "usb_pll", 0, APMU_USB, 0x12, 0x12, 0x0, 0, &usb_lock}, 211 /* The gate clocks has mux parent. */ 212 {PXA910_CLK_SDH0, "sdh0_clk", "sdh0_mux", CLK_SET_RATE_PARENT, APMU_SDH0, 0x1b, 0x1b, 0x0, 0, &sdh0_lock}, 213 {PXA910_CLK_SDH1, "sdh1_clk", "sdh1_mux", CLK_SET_RATE_PARENT, APMU_SDH1, 0x1b, 0x1b, 0x0, 0, &sdh1_lock}, 214 {PXA910_CLK_DISP0, "disp0_clk", "disp0_mux", CLK_SET_RATE_PARENT, APMU_DISP0, 0x1b, 0x1b, 0x0, 0, &disp0_lock}, 215 {PXA910_CLK_CCIC0, "ccic0_clk", "ccic0_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x1b, 0x1b, 0x0, 0, &ccic0_lock}, 216 {PXA910_CLK_CCIC0_PHY, "ccic0_phy_clk", "ccic0_phy_mux", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x24, 0x24, 0x0, 0, &ccic0_lock}, 217 {PXA910_CLK_CCIC0_SPHY, "ccic0_sphy_clk", "ccic0_sphy_div", CLK_SET_RATE_PARENT, APMU_CCIC0, 0x300, 0x300, 0x0, 0, &ccic0_lock}, 218 }; 219 220 static void pxa910_axi_periph_clk_init(struct pxa910_clk_unit *pxa_unit) 221 { 222 struct mmp_clk_unit *unit = &pxa_unit->unit; 223 224 mmp_register_mux_clks(unit, apmu_mux_clks, pxa_unit->apmu_base, 225 ARRAY_SIZE(apmu_mux_clks)); 226 227 mmp_register_div_clks(unit, apmu_div_clks, pxa_unit->apmu_base, 228 ARRAY_SIZE(apmu_div_clks)); 229 230 mmp_register_gate_clks(unit, apmu_gate_clks, pxa_unit->apmu_base, 231 ARRAY_SIZE(apmu_gate_clks)); 232 } 233 234 static void pxa910_clk_reset_init(struct device_node *np, 235 struct pxa910_clk_unit *pxa_unit) 236 { 237 struct mmp_clk_reset_cell *cells; 238 int i, base, nr_resets_apbc, nr_resets_apbcp, nr_resets; 239 240 nr_resets_apbc = ARRAY_SIZE(apbc_gate_clks); 241 nr_resets_apbcp = ARRAY_SIZE(apbcp_gate_clks); 242 nr_resets = nr_resets_apbc + nr_resets_apbcp; 243 cells = kcalloc(nr_resets, sizeof(*cells), GFP_KERNEL); 244 if (!cells) 245 return; 246 247 base = 0; 248 for (i = 0; i < nr_resets_apbc; i++) { 249 cells[base + i].clk_id = apbc_gate_clks[i].id; 250 cells[base + i].reg = 251 pxa_unit->apbc_base + apbc_gate_clks[i].offset; 252 cells[base + i].flags = 0; 253 cells[base + i].lock = apbc_gate_clks[i].lock; 254 cells[base + i].bits = 0x4; 255 } 256 257 base = nr_resets_apbc; 258 for (i = 0; i < nr_resets_apbcp; i++) { 259 cells[base + i].clk_id = apbcp_gate_clks[i].id; 260 cells[base + i].reg = 261 pxa_unit->apbc_base + apbc_gate_clks[i].offset; 262 cells[base + i].flags = 0; 263 cells[base + i].lock = apbc_gate_clks[i].lock; 264 cells[base + i].bits = 0x4; 265 } 266 267 mmp_clk_reset_register(np, cells, nr_resets); 268 } 269 270 static void __init pxa910_clk_init(struct device_node *np) 271 { 272 struct pxa910_clk_unit *pxa_unit; 273 274 pxa_unit = kzalloc(sizeof(*pxa_unit), GFP_KERNEL); 275 if (!pxa_unit) 276 return; 277 278 pxa_unit->mpmu_base = of_iomap(np, 0); 279 if (!pxa_unit->mpmu_base) { 280 pr_err("failed to map mpmu registers\n"); 281 goto free_memory; 282 } 283 284 pxa_unit->apmu_base = of_iomap(np, 1); 285 if (!pxa_unit->apmu_base) { 286 pr_err("failed to map apmu registers\n"); 287 goto unmap_mpmu_region; 288 } 289 290 pxa_unit->apbc_base = of_iomap(np, 2); 291 if (!pxa_unit->apbc_base) { 292 pr_err("failed to map apbc registers\n"); 293 goto unmap_apmu_region; 294 } 295 296 pxa_unit->apbcp_base = of_iomap(np, 3); 297 if (!pxa_unit->apbcp_base) { 298 pr_err("failed to map apbcp registers\n"); 299 goto unmap_apbc_region; 300 } 301 302 mmp_clk_init(np, &pxa_unit->unit, PXA910_NR_CLKS); 303 304 pxa910_pll_init(pxa_unit); 305 306 pxa910_apb_periph_clk_init(pxa_unit); 307 308 pxa910_axi_periph_clk_init(pxa_unit); 309 310 pxa910_clk_reset_init(np, pxa_unit); 311 312 return; 313 314 unmap_apbc_region: 315 iounmap(pxa_unit->apbc_base); 316 unmap_apmu_region: 317 iounmap(pxa_unit->apmu_base); 318 unmap_mpmu_region: 319 iounmap(pxa_unit->mpmu_base); 320 free_memory: 321 kfree(pxa_unit); 322 } 323 324 CLK_OF_DECLARE(pxa910_clk, "marvell,pxa910-clock", pxa910_clk_init); 325